Backlight unit for display device

Abstract

The present application provides a kind of backlight unit for display device, it includes: substrate;Multiple light sources, are arranged into matrix pattern on the substrate, multiple the light source each includes red light emitting diode, green light emitting diode and blue light emitting diode;Diffusion plate is set to diffuse the light emitted from multiple the light source;And at least one optical sheet, between display panel and the diffusion plate;In order to compensate the efficiency reduction of the red light emitting diode, the light emitting area of the red light emitting diode is greater than the light emitting area of the green light emitting diode and greater than the light emitting area of the blue light emitting diode;The red light emitting diode, the green light emitting diode and the blue light emitting diode are arranged adjacent to each other to form a single pixel unit.

Description

Technical Field

[0001] This invention relates to a backlight unit for a display device. Background Technology

[0002] With the development of the information society, the requirements for display devices have also increased in various forms. Correspondingly, in recent years, various display devices such as LCD (Liquid Crystal Display Device), PDP (Plasma Display Panel), ELD (Electroluminescent Display), and VFD (Vacuum Fluorescent Display) have been researched and applied.

[0003] The LCD panel can be provided with a TFT substrate and a color substrate facing each other with a liquid crystal layer between them, and can display images using light provided from the backlight unit.

[0004] Recently, with increasing attention to the image quality of display devices, color performance or color reproduction that is close to true color has received important attention, and a lot of research has been conducted on backlight units for display devices that improve light uniformity and are used to achieve true color. Summary of the Invention

[0005] The purpose of this invention is to solve the aforementioned problems and other issues.

[0006] Another objective is to provide a backlight unit for a display device that can improve image quality.

[0007] Another objective is to provide a backlight unit for a display device that can improve color performance.

[0008] Another objective is to provide a backlight unit for a display device that can improve brightness.

[0009] Another objective is to provide a backlight unit for a display device that can expand the viewing angle.

[0010] Another objective is to provide a backlight unit for a display device that can improve the performance of white light.

[0011] Another objective is to provide a backlight unit for a display device that includes a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode.

[0012] Another objective is to provide a backlight unit for a display device that can improve color separation.

[0013] Another objective is to provide a backlight unit for a display device that can reduce the size of the light source.

[0014] Another objective is to provide a backlight unit for a display device that can reduce the operating temperature of the light source.

[0015] Another objective is to provide a backlight unit for display devices that can reduce manufacturing costs.

[0016] According to one aspect of the invention for achieving the above or other objectives, a backlight unit for a display device includes: a plurality of light sources arranged in a matrix pattern, each of the plurality of light sources including a red light-emitting diode (LED), a green light-emitting diode, and a blue light-emitting diode; a diffuser plate configured to receive light from the plurality of light sources; and at least one optical sheet located between a display panel and the diffuser plate; wherein the light-emitting area of ​​the red light-emitting diode is greater than the light-emitting area of ​​the green light-emitting diode and the light-emitting area of ​​the blue light-emitting diode; and the arrangement of the red light-emitting diode, the green light-emitting diode, and the blue light-emitting diode can form a perimeter that is substantially square in a plan view.

[0017] According to one aspect of the present invention for achieving the above or other objectives, a backlight unit for a display device includes: a plurality of light sources arranged in a matrix pattern, each of the plurality of light sources including a red light-emitting diode (LED), a green light-emitting diode, and a blue light-emitting diode; a diffuser plate configured to receive light from the plurality of light sources; and at least one optical sheet located between a display panel and the diffuser plate; the light-emitting area of ​​the red light-emitting diode is greater than the light-emitting area of ​​the green light-emitting diode and the light-emitting area of ​​the blue light-emitting diode; the light sources emit white light, and the current density of the red light-emitting diode may be less than or equal to the current density of the green light-emitting diode and the blue light-emitting diode.

[0018] According to one aspect of the invention for achieving the above or other objectives, a backlight unit for a display device includes: a plurality of light sources arranged in a matrix pattern, each of the plurality of light sources including a red light-emitting diode (LED), a green light-emitting diode, and a blue light-emitting diode; a diffuser plate configured to receive light from the plurality of light sources; and at least one optical sheet located between a display panel and the diffuser plate; the light-emitting area of ​​the red LED is greater than the light-emitting area of ​​the green LED and the light-emitting area of ​​the blue LED; the operating temperature of the light sources can be less than or equal to about 50 degrees Celsius, the current applied to the red LED can be greater than or equal to about 1.5 times the current applied to the blue LED, and the current applied to the green LED can be greater than or equal to about 1.3 times the current applied to the blue LED.

[0019] The effects of the backlight unit for the display device of the present invention will be explained below.

[0020] According to at least one embodiment of the present invention, a backlight unit for a display device that can improve image quality can be provided.

[0021] According to at least one embodiment of the present invention, a backlight unit for a display device capable of improving color performance can be provided.

[0022] According to at least one embodiment of the present invention, a backlight unit for a display device capable of improving brightness can be provided.

[0023] According to at least one embodiment of the present invention, a backlight unit for a display device capable of expanding the viewing angle can be provided.

[0024] According to at least one embodiment of the present invention, a backlight unit for a display device that can improve the performance of white light can be provided.

[0025] According to at least one embodiment of the present invention, a backlight unit for a display device comprising a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode can be provided.

[0026] According to at least one embodiment of the present invention, a backlight unit for a display device that can improve color separation phenomena can be provided.

[0027] According to at least one embodiment of the present invention, a backlight unit for a display device that can reduce the size of the light source can be provided.

[0028] According to at least one embodiment of the present invention, a backlight unit for a display device that can reduce the operating temperature of the light source can be provided.

[0029] According to at least one embodiment of the present invention, a backlight unit for a display device that can reduce manufacturing costs can be provided.

[0030] The scope of applicability of the present invention will become clear from the following detailed description. However, since those skilled in the art will readily understand the various changes and modifications within the spirit and scope of the invention, the detailed description and specific embodiments, such as preferred embodiments, should be understood only by way of illustration. Attached Figure Description

[0031] Figures 1 to 58 This is a diagram illustrating a backlight unit for a display device and an example of a display device including the backlight unit of the present invention, according to a plurality of embodiments thereof.

[0032] Explanation of reference numerals in the attached figures

[0033] 100: Display device; 105: Front cover

[0034] 110: Display Panel 117: Guide Panel

[0035] 120: Backlight unit; 122: Substrate

[0036] 123: Optical layer; 125: Optical sheet

[0037] 126: Reflector sheet; 127: Light guide plate

[0038] 128: Support component; 129: Diffuser plate

[0039] 130: Frame 150: Back Cover

[0040] 200: Light source; 210: Red light-emitting diode.

[0041] 220: Green LED; 230: Blue LED

[0042] 240: Protective lens 250: Protective film

[0043] 251: First electrode pad; 252: Second electrode pad

[0044] 253: Third electrode pad; 260: Reflective coating

[0045] 270: Chip substrate Detailed Implementation

[0046] Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings, and the same or similar components will be given the same reference numerals, regardless of the drawing numbers, and repeated descriptions thereof will be omitted.

[0047] The suffixes “module” and “section” used for the constituent elements in the following description are merely assigned or used interchangeably for the convenience of writing the instruction manual, and do not inherently distinguish one another from the other.

[0048] Furthermore, when describing the embodiments disclosed in this specification, detailed descriptions of related well-known technologies are omitted if it is determined that such detailed descriptions may obscure the spirit of the embodiments disclosed in this specification. Additionally, the accompanying drawings are only used to aid in understanding the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the drawings. They should be understood to include all modifications, equivalents, and substitutions within the scope of the ideas and techniques outlined in this specification.

[0049] Terms containing ordinal numbers, such as "first" and "second," can be used to describe various constituent elements, but the constituent elements are not limited by these terms. These terms are used only for the purpose of distinguishing one constituent element from others.

[0050] When a constituent element is referred to as "connected" or "linked" to another constituent element, it should be understood that it may be directly connected to or linked to the other constituent element, but there may also be other constituent elements between them. Conversely, when a constituent element is referred to as "directly connected" or "directly linked" to another constituent element, it should be understood that there are no other constituent elements between them.

[0051] Unless the context clearly indicates otherwise, singular expressions include plural expressions.

[0052] In this application, terms such as “comprising” or “having” are used only to specify the presence of features, numbers, steps, actions, constituent elements, components or combinations thereof as described in the specification, and are not intended to exclude the possibility of the presence or addition of one or more other features or numbers, steps, actions, constituent elements, components or combinations thereof.

[0053] The directions shown in the accompanying drawings—U (up), D (down), Le (left), Ri (right), F (front), and R (rear)—are for illustrative purposes only, and the technical concepts disclosed in this specification are not limited thereto.

[0054] Reference Figure 1 The display device 100 may include a display panel 110. The display panel 110 may display images.

[0055] The display device 100 may include a first long side LS1, a second long side LS2 opposite to the first long side LS1, a first short side SS1 adjacent to the first long side LS1 and the second long side LS2, and a second short side SS2 opposite to the first short side SS1. On the other hand, for ease of explanation, the case in which the lengths of the first long side LS1 and the second long side LS2 are greater than the lengths of the first short side SS1 and the second short side SS2 is shown and explained. However, the lengths of the first long side LS1 and the second long side LS2 may also be approximately the same as the lengths of the first short side SS1 and the second short side SS2.

[0056] The directions parallel to the long sides LS1 and LS2 of the display device 100 can be called the left-right directions. The directions parallel to the short sides SS1 and SS2 of the display device 100 can be called the up-down directions. The directions perpendicular to the long sides LS1 and LS2 and the short sides SS1 and SS2 of the display device 100 can be called the front-back directions.

[0057] The direction in which the image is displayed on the display panel 110 can be referred to as the front (F, z) and the opposite direction as the rear (R). The first long side LS1 can be referred to as the top side (U, y) and the second long side LS2 can be referred to as the bottom side (D). The first short side SS1 can be referred to as the left side (Le, x) and the second short side SS2 can be referred to as the right side (Ri).

[0058] The first long side LS1, the second long side LS2, the first short side SS1, and the second short side SS2 can be referred to as the edges of the display device 100. The position where the first long side LS1, the second long side LS2, the first short side SS1, and the second short side SS2 meet each other can be referred to as the corner.

[0059] The position where the first short side SS1 and the first long side LS1 meet is called the first corner Ca. The position where the first long side LS1 and the second short side SS2 meet is called the second corner Cb. The position where the second short side SS2 and the second long side LS2 meet is called the third corner Cc. The position where the second long side LS2 and the first short side SS1 meet is called the fourth corner Cd.

[0060] Reference Figure 2 and Figure 3 The display device 100 may include a display panel 110, a front cover 105, a guide panel 117, a backlight unit 120, a frame 130, and a rear cover 150.

[0061] The display panel 110 can form the front of the display device 100 and can display images. The display panel 110 can display images by outputting the RGB (Red, Green, or Blue) of each pixel in a time-matched manner.

[0062] Display panel 110 may have a rectangular shape. Display panel 110 may be available in various sizes. The size of display panel 110 may be the diagonal length of the screen measured in feet. For example, display panel 110 may be approximately 115 feet, approximately 100 feet, approximately 86 feet, or approximately 75 feet in size.

[0063] The display panel 110 can be divided into an active area for displaying images and a de-active area for not displaying images.

[0064] The display panel 110 may include a front plate 1101 and a rear plate 1105 that are opposite to each other and separated by a liquid crystal layer 1103. The front plate 1101 of the display panel 110 may be referred to as the first polarizing plate 1101, and the rear plate 1105 may be referred to as the second polarizing plate 1105. The display panel 110 may be referred to as an LCD panel.

[0065] The front panel 1101 may include a plurality of pixels formed by red sub-pixels, green sub-pixels, and blue sub-pixels. The front panel 1101 may output light corresponding to red, green, or blue according to a control signal.

[0066] The back panel 1105 may include a plurality of switching elements. The back panel 1105 can switch pixel electrodes on and off. For example, the pixel electrodes can change the molecular arrangement of the liquid crystal layer according to a control signal input from an external source.

[0067] The liquid crystal layer 1103 may include a plurality of liquid crystal molecules. The arrangement of the plurality of liquid crystal molecules may vary in response to the voltage difference generated between the pixel electrode and the common electrode. The liquid crystal layer 1103 may transmit or block the transmission of light provided from the backlight unit 120 to the front panel 1101.

[0068] The front panel 1101 can be attached to the liquid crystal layer 1103 by the first adhesive layer 1102, and the rear panel 1105 can be attached to the liquid crystal layer 1103 by the second adhesive layer 1104.

[0069] The front cover 105 may cover at least a portion of the front and side surfaces of the display panel 110. The front cover 105 may be divided into a front cover located on the front of the display panel 110 and a side cover located on the side surfaces. At least one of the front cover and the side cover may be omitted.

[0070] The guide panel 117 may surround the periphery of the display panel 110 and cover the sides of the display panel 110. The guide panel 117 may be combined with or support the display panel 110.

[0071] The backlight unit 120 may be located behind the display panel 110. The backlight unit 120 may include a plurality of light sources. The backlight unit 120 may be integrated with the frame 130 in front of the frame 130. The backlight unit 120 may be driven in a global driving mode or in a local driving mode, such as local dimming, pulse driving, etc. The backlight unit 120 may include an optical sheet 125 and an optical layer 123.

[0072] The optical sheet 125 can uniformly transmit light from the light source to the display panel 110. The optical sheet 125 can be composed of multiple layers. For example, the optical sheet 125 may include a prism layer or a diffusion layer. For example, the optical sheet 125 may include a double brightness enhancement film (DBEF). On the other hand, the bonding portion 125e of the optical sheet 125 can be bonded to the front cover 105, the frame 130, or the rear cover 150.

[0073] The frame 130 can be located behind the backlight unit 120 and can support the configuration of the display device 100. For example, a PCB (Printed Circuit Board) containing the backlight unit 120 and a plurality of electronic components can be attached to the frame 130. The frame 130 can be referred to as the cover bottom 130.

[0074] The rear cover 150 can cover the rear of the frame 130. The rear cover 150 can be attached to the frame 130 and / or the front cover 105.

[0075] Reference Figure 4 and Figure 5 The backlight unit 120 may include an optical layer 123 and an optical sheet 125. The optical layer 123 may include a substrate 122, at least one light source 200, a reflector 126, and a diffuser 129.

[0076] The substrate 122 may be attached to the front side of the frame 130. The substrate 122 may have a plate shape or be composed of a plurality of strips separated from each other in a vertical direction. Alternatively, the substrate 122 may also have a fork shape comprising a first plate extending elongatedly and a plurality of second plates intersecting the first plate. The substrate 122 may be made of at least one of polyethylene terephthalate (PET), glass, polycarbonate (PC), and silicon. The substrate 122 may be a PCB (Printed Circuit Board).

[0077] At least one light source 200 may be mounted on the substrate 122. A plurality of light sources 200 may be spaced apart on the substrate 122. Electrode patterns for connecting the adapter and the plurality of light sources 200 may be formed on the substrate 122. For example, carbon nanotube electrode patterns for connecting the optical component 200 and the adapter may be formed on the substrate 122.

[0078] For example, light source 200 may be a light-emitting diode (LED) package including a light-emitting diode (LED) chip or at least one LED chip. Light source 200 may be composed of colored LEDs that emit at least one color: red, green, or blue. For example, light source 200 may include a red LED that emits red light, a green LED that emits green light, and a blue LED that emits blue light.

[0079] Thus, light source 200 can combine red, green, and blue light to achieve white light. For example, light source 200 can achieve white light corresponding to color coordinates (approximately 0.281, approximately 0.288) and / or a color temperature of approximately 10000K by combining red, green, and blue light.

[0080] The light sources 200 can be arranged in a matrix pattern. For example, the light sources 200 can be arranged along the long and short sides of the substrate 122. The row direction of the matrix pattern can be parallel to the long side of the substrate 122. The column direction of the matrix pattern can be parallel to the short side of the substrate 122. For example, the column direction of the matrix pattern can be parallel to the vertical direction, and the row direction of the matrix pattern can be parallel to the horizontal direction.

[0081] However, not limited to this, on the contrary, the row direction and column direction of the matrix pattern can also be parallel to the short side direction and long side direction of the substrate 122, respectively.

[0082] The reflector 126 may be located in front of the substrate 122. The reflector 126 may have a plurality of holes 126h for providing a plurality of light sources 200. The reflector 126 may include at least one of a metal or metal oxide as the reflective material. For example, the reflector 126 may include a metal and / or metal oxide with high reflectivity, such as at least one of aluminum (Al), silver (Ag), gold (Au), or titanium dioxide (TiO2). The reflector 126 may reflect light from the light source 200 or light reflected from the diffuser 129 forward.

[0083] A diffuser plate 129 can be located in front of the reflector 126. The diffuser plate 129 can receive light from the light source 200. The diffuser plate 129 can diffuse the light from the light source 200. A support member 128 can be located between the reflector 126 and the diffuser plate 129, and can support the back side of the diffuser plate 129. An air gap can be formed between the reflector 126 and the diffuser plate 129, through which the light from the optical assembly 200 can be diffused more widely. The diffuser plate 129 can be referred to as an optical plate 129.

[0084] Optical sheet 125 may be located in front of diffuser plate 129. Optical sheet 125 may be provided between diffuser plate 129 and display panel 110. The back side of optical sheet 125 may be in close contact with diffuser plate 129, and the front side of optical sheet 125 may be in close contact with or adjacent to the back side of display panel 110. Optical sheet 125 may include at least one layer.

[0085] For example, the optical sheet 125 may include a plurality of layers having different functions from each other. The first optical layer 1251 may be a diffusion layer, and the second optical layer 1252 and the third optical layer 1253 may be prism layers. The prism layers can focus the light emitted from the diffuser 129 and provide it to the display panel 110. The diffusion layers can make the light distribution more uniform by preventing the light emitted from the diffuser 129 from being partially concentrated. The number and / or position of the prism layers and diffusion layers can be varied.

[0086] Reference Figure 6 and Figure 7 The substrate 122 may include a plurality of bars that are separated from each other. For example, the substrate 122 may include three bars 122A, 122B, and 122C (see reference). Figure 4 As another example, substrate 122 may include two strips 122A and 122B (see reference). Figure 5 As another example, substrate 122 may include at least one plate-shaped substrate or at least one fork-shaped substrate.

[0087] The frame 130 may have an overall quadrilateral tray shape. The frame 130 may include a central portion 131, a side portion 133, and a seating portion 130H, 130V.

[0088] The central portion 131 can be a quadrilateral plate, and the base plate 122 can be attached to the front side of the central portion 131. The central portion 131 can be referred to as the base 131.

[0089] Side portion 133 can extend forward at an angle from the edge of central portion 131. Side portion 133 can be referred to as chamfer portion 133. First side portion 133a can extend forward at an angle from the top edge of central portion 131. The angle between the first side portion 133a and the front surface of central portion 131 can be an obtuse angle. Second side portion 133b can extend forward at an angle from the bottom edge of central portion 131. The angle between the second side portion 133b and the front surface of central portion 131 can be an obtuse angle. Third side portion 133c can extend forward at an angle from the left side of central portion 131. The angle between the third side portion 133c and the front surface of central portion 131 can be an obtuse angle. Fourth side portion 133d can extend forward at an angle from the right side of central portion 131. The first to fourth side portions 133a, 133b, 133c, and 133d can be connected to each other.

[0090] The mounting portions 130H and 130V can extend from the end of the side portion 133 in a direction parallel to the central portion 131. The vertical portion 130V can extend in a vertical direction (i.e., up-down direction) and can form the left and right sides of the frame 130. The horizontal portion 130H can extend in a horizontal direction (i.e., left-right direction) and can form the top and bottom sides of the frame 130.

[0091] A reflective sheet 126 may cover a substrate 122, and a plurality of light sources 200 on the substrate 122 may be located in a plurality of holes 126h in the reflective sheet 126. The reflective sheet 126 may have a shape corresponding to the frame 130. The reflective sheet 126 may include a central portion 126P and a side portion 126C. The central portion 126P may have a quadrilateral shape, and the side portion 126C may be bent forward at an angle from the edge of the central portion 126P. The central portion 126P may have a shape corresponding to the central portion 131, and the substrate 122 may be covered by the central portion 126P. The central portion 126P may be referred to as the base 126P, and the side portion 126C may be referred to as the chamfer portion 126C.

[0092] The first side portion 126Ca can be bent forward at an angle from the top of the central portion 126P. A portion 126Cae of the first side portion 126Ca can be bent toward the first side portion 133a to be positioned on the horizontal portion 130H extending from the first side portion 133a. The second side portion 126Cb can be bent forward at an angle from the bottom of the central portion 126P. The second side portion 126Cb can be bent toward the second side portion 133b, and a portion 126Cbe of the second side portion 126Cb can be bent to be positioned on the horizontal portion 130H extending from the second side portion 133b. The third side portion 126Cc can be bent forward at an angle from the left side of the central portion 126P. The third side portion 126Cc can be bent toward the third side portion 133c, and a portion 126Cce of the third side portion 126Cc can be bent to be positioned on the vertical portion 130V extending from the third side portion 133c. The fourth side portion 126Cd can be bent forward at an angle from the right side of the central portion 126P. The fourth side portion 126Cd can be bent toward the fourth side portion 133d, and a portion 126Cde of the fourth side portion 126Cd can be bent to be placed on the vertical portion 130V extending from the fourth side portion 133d.

[0093] Reference Figure 8 and Figure 9 The backlight unit 120p may include an optical layer 123a and an optical sheet 125. The optical layer 123a may be located between the frame 130 and the display panel 110. The optical layer 123a may be supported by the frame 130. The optical layer 123a may include a substrate 122, at least one light source 200, a reflective sheet 126, and a light guide plate 127.

[0094] The light guide plate 127 can be located between the frame 130 and the optical sheet 125, and can be supported by the frame 130. The light guide plate 127 can be referred to as the optical sheet 127.

[0095] The substrate 122 may be adjacent to the periphery of the light guide plate 127 and may be bonded to one side of the guiding panel 117. For example, the substrate 122 may be adjacent to the lower edge of the light guide plate 127. The substrate 122 may be made of at least one of polyethylene terephthalate (PET), glass, polycarbonate (PC), and silicon. The substrate 122 may be a PCB (Printed Circuit Board).

[0096] At least one light source 200 may be mounted on the substrate 122. A plurality of light sources 200 may be spaced apart on the substrate 122. Electrode patterns for connecting the adapter and the light source 200 may be formed on the substrate 122. For example, carbon nanotube electrode patterns for connecting the light source 200 and the adapter may be formed on the substrate 122.

[0097] For example, light source 200 may be a light-emitting diode (LED) package including a light-emitting diode (LED) chip or at least one LED chip. Light source 200 may be composed of colored LEDs that emit at least one color: red, green, or blue. For example, light source 200 may include a red LED that emits red light, a green LED that emits green light, and a blue LED that emits blue light.

[0098] Thus, light source 200 can combine red, green, and blue light to achieve white light. For example, light source 200 can achieve white light corresponding to color coordinates (approximately 0.281, approximately 0.288) and / or a color temperature of approximately 10000K by combining red, green, and blue light.

[0099] The reflector 126 may be located between the frame 130 and the light guide plate 127, and may be supported by the frame 130. The reflector 126 may include at least one of a metal and a metal oxide as a reflective material. For example, the reflector 126 may include a metal and / or metal oxide with high reflectivity, such as at least one of aluminum (Al), silver (Ag), gold (Au), and titanium dioxide (TiO2).

[0100] Thus, the light source 200 can provide light to the edge of the light guide plate 127. The light flowing into the light guide plate 127 can be directed forward by the light guide plate 127 and the reflector 126.

[0101] Reference Figure 10 and Figure 11 The light source 200 may include a plurality of light-emitting diodes (LEDs) configured to emit light of different colors from each other. The light source 200 may include at least one of a red LED 210, a green LED 220, and a blue LED 230. For example, the light source 200 may include a red LED 210, a green LED 220, and a blue LED 230. The light source 200 can achieve white light through a combination of red, green, and blue light emitted from the red LED 210, green LED 220, and blue LED 230. For example, the light source 200 may be referred to as an RGB light source 200 or (a plurality of) RGB LEDs.

[0102] Thus, light source 200 can emit white light. For example, light source 200 can produce white light corresponding to color coordinates (approximately 0.281, approximately 0.288) and / or a color temperature of approximately 10,000 K.

[0103] For ease of explanation, Figures 10 to 11The red light-emitting diode 210, green light-emitting diode 220 and blue light-emitting diode 230 of the light source 200 are shown individually, but in one embodiment, the red light-emitting diode 210, green light-emitting diode 220 and blue light-emitting diode 230 of the light source 200 may also be provided as a single or multiple units depending on the design.

[0104] Hereinafter, the red LED 210, the green LED 220, and the blue LED 230 can be referred to as LEDs, and one of the red LED 210, the green LED 220, and the blue LED 230 can be referred to as an LED.

[0105] The backlight unit 120 for the display device may also include a substrate 122 on which the light source 200 is mounted. A plurality of light-emitting diodes may be directly mounted on the substrate 122. For example, the light source 200 may be formed as a COB (Chip On Board) type.

[0106] The substrate 122 may include electrode patterns (not shown) configured to supply power to the light-emitting diodes 210, 220, and 230. The electrode patterns may be electrically connected to the light-emitting diodes 210, 220, and 230. The electrode patterns may include a conductive material. For example, the electrode patterns may include copper (Cu).

[0107] The substrate 122 may also include an insulating layer (not labeled) on the side where the light-emitting diodes 210, 220, and 230 are mounted. This insulating layer may be referred to as a PSR layer (Photo imageable solder resist layer). The insulating layer may cover most of the electrode pattern of the substrate 122. A portion of the electrode pattern may be exposed through the insulating layer. The light-emitting diodes 210, 220, and 230 may be provided on a portion of the electrode pattern. The light-emitting diodes 210, 220, and 230 may be in direct or indirect contact with or connected to a portion of the electrode pattern. For example, a plurality of electrode pads may be provided between the light-emitting diodes 210, 220, and 230 and the electrode pattern, enabling electrical connection between the light-emitting diodes 210, 220, and 230 and the electrode pattern. The electrode pads may include a conductive material. For example, the electrode pads may include lead (Pb).

[0108] The light source 200 may also include a protective lens 240 covering the light-emitting diodes 210, 220, and 230. The protective lens 240 may be mounted on one side of the substrate 122. The protective lens 240 may protrude from one side of the substrate 122. The protective lens 240 may have a dome shape or a hemispherical shape. Thus, the protective lens 240 can protect the light-emitting diodes 210, 220, and 230. Additionally, the protective lens 240 can also diffuse the light emitted from the light-emitting diodes 210, 220, and 230. The protective lens 240 may include a transparent or translucent material. For example, the protective lens 240 may include silicon or a synthetic polymer.

[0109] Reference Figure 12 and Figure 13 In one embodiment, the light source 200 may further include a chip substrate 270 on which light-emitting diodes 210, 220, and 230 are mounted, and a protective film 250 on the chip substrate 270. The light-emitting diodes 210, 220, and 230 may be directly mounted on the chip substrate 270. The chip substrate 270 may be mounted on a substrate 122. For example, the light source 200 may be formed as a CSP (Chip Scale Package) type.

[0110] Chip substrate 270 can be electrically connected to substrate 122. Electrode pads 251, 252, and 253 can be provided between chip substrate 270 and substrate 122. Electrode pads 251, 252, and 253 can electrically connect light-emitting diodes 210, 220, and 230 mounted on chip substrate 270 to substrate 122. Electrode pads 251, 252, and 253 can include a conductive material. For example, electrode pads 251, 252, and 253 can include lead (Pb).

[0111] Electrode pads 251, 252, and 253 may include a first electrode pad 251 electrically connected to a red LED 210, a second electrode pad 252 electrically connected to a green LED 220, and a third electrode pad 253 electrically connected to a blue LED 230. The first electrode pad 251 may be located below the red LED 210. The second electrode pad 252 may be located below the green LED 220. The third electrode pad 253 may be located below the blue LED 230.

[0112] The light source 200 may also include a protective film 250 covering the light-emitting diodes 210, 220, and 230. The protective film 250 may be provided on one side of the chip substrate 270. The protective film 250 may have a hexahedral shape. Thus, the protective film 250 can protect the light-emitting diodes 210, 220, and 230. The protective film 250 may include a transparent or translucent material. For example, the protective film 250 may include silicon or a synthetic polymer.

[0113] Reference Figure 14 The light source 200 may include a red light-emitting diode 210, a green light-emitting diode 220, and a blue light-emitting diode 230. The light-emitting diodes 210, 220, and 230 may be arranged in one direction. For example, the green light-emitting diode 220, red light-emitting diode 210, and blue light-emitting diode 230 may be arranged sequentially along the row direction or the left-right direction of a matrix pattern. The red light-emitting diode 210 may be provided between the green light-emitting diode 220 and the blue light-emitting diode 230.

[0114] The red LED 210, green LED 220, and blue LED 230 can each extend long. These LEDs can extend long along the row or column direction of the matrix pattern. They can also extend long along the long or short side direction of the substrate 122. For example, they can extend long along the column direction or the vertical direction of the matrix pattern.

[0115] The lengths of the red LED 210, green LED 220, and blue LED 230 can be substantially the same. For example, each of the red LED 210, green LED 220, and blue LED 230 can extend long along the column direction or the vertical direction of the matrix pattern, and their lengths can be substantially the same.

[0116] The widths of the red LED 210, green LED 220, and blue LED 230 can be measured in a direction intersecting the length direction. For example, the widths of the red LED 210, green LED 220, and blue LED 230 can be measured in the row direction or the left-right direction of a matrix pattern orthogonal to the length direction. The width of the red LED 210 can be greater than the widths of the green LED 220 and the blue LED 230. The width of the green LED 220 can be substantially the same as the width of the blue LED 230.

[0117] The red LED 210, green LED 220, and blue LED 230 can each have a quadrilateral shape. The aspect ratio of the red LED 210 can be greater than that of the green LED 220 and the blue LED 230. The aspect ratios of the green LED 220 and the blue LED 230 can be substantially the same. The aspect ratio can be defined as the ratio of the horizontal length to the vertical length. For example, the aspect ratio can be defined as the ratio of the row length to the column length of a matrix pattern.

[0118] Each of the red LED 210, green LED 220, and blue LED 230 may have a light-emitting surface. The light-emitting surfaces of the red LED 210, green LED 220, and blue LED 230 may face the display panel 110. The light-emitting surfaces of the red LED 210, green LED 220, and blue LED 230 may be defined in a plan view. A plan view may refer to a view viewed in a direction facing the light-emitting surfaces of the red LED 210, green LED 220, and blue LED 230.

[0119] The light-emitting area of ​​the red LED 210 can be greater than or equal to the light-emitting area of ​​the green LED 220 and / or the blue LED 230. The light-emitting area of ​​the red LED 210 can be approximately 1.3 times larger than that of the green LED 220 or the blue LED 230. For example, the light-emitting area of ​​the red LED 210 can be approximately 2.0 times larger than that of the green LED 220 and the blue LED 230. The light-emitting area refers to the area of ​​the light-emitting surface of the LED.

[0120] The light-emitting area of ​​the blue LED 230 can be substantially the same as that of the green LED 220.

[0121] Therefore, the current density of the red LED 210 can be lower than the current density of the green LED 220 and the blue LED 230. Current density can be defined as the current applied to the light-emitting area of ​​the LED. The current density of the red LED 210 can be less than the current density of the blue LED 230. For example, the current density of the red LED 210 can correspond to approximately 60% to approximately 100% of the current density of the blue LED 230. The current density of the blue LED 230 can be less than the current density of the green LED 220. For example, the current density of the blue LED 230 can correspond to approximately 60% to approximately 80% of the current density of the green LED 220. The current density of the green LED 220 can be approximately 1.3 times higher than the current density of the blue LED 230. For example, the ratio of the current density of the blue LED 230, the current density of the green LED 220, and the current density of the red LED 210 can correspond to approximately 1:approximately 1.4:approximately 0.8.

[0122] Furthermore, since the light-emitting area of ​​the red LED 210 is larger than that of the green LED 220 and the blue LED 230, the current applied to the red LED 210 can be further increased. The current applied to the red LED 210 can be greater than the current applied to the green LED 220 and the blue LED 230. For example, the current applied to the red LED 210 can be approximately 1.5 times greater than the current applied to the blue LED 230. Similarly, the current applied to the green LED 220 can be greater than the current applied to the blue LED 230. For example, the current applied to the green LED 220 can be approximately 1.3 times greater than the current applied to the blue LED 230. For example, the ratio of the current applied to the blue LED 230, the current applied to the green LED 220, and the current applied to the red LED 210 can be approximately 1:approximately 1.4:approximately 1.6. However, this is not the only possibility; the ratio of the current applied to the blue LED 230, the current applied to the green LED 220, and the current applied to the red LED 210 may vary depending on the performance of the LEDs.

[0123] Nevertheless, the current density of the red LED 210 can be lower than that of the green LED 220 and the blue LED 230, thus reducing the heat generated by the red LED 210.

[0124] In addition, it can minimize the performance degradation of the red light-emitting diode 210 caused by heat.

[0125] In addition, it can improve the white light realization performance of light source 200.

[0126] In addition, the operating temperature of the light source 200 can be reduced. For example, the light source 200 can operate in a range of approximately 40 degrees Celsius to approximately 70 degrees Celsius. The light source 200 can operate below approximately 50 degrees Celsius.

[0127] Furthermore, the relative luminous efficiency of the red LED 210 can be greater than or equal to approximately 60%. Relative luminous efficiency refers to luminous efficiency relative to its maximum luminous efficiency. Luminous efficiency can be defined as the ratio of the speed of light (lumen, lm) to electrical power (watt, W). The maximum luminous efficiency corresponds to the luminous efficiency of the backlight unit 120 during the initial stage of operation (e.g., the starting point of operation). Luminous efficiency can gradually decrease over time.

[0128] Additionally, a backlight unit 120 for a display device may be provided, capable of improving color performance and / or brightness. For example, the relative brightness of the red light-emitting diode 210 may be greater than or equal to approximately 85%. Relative brightness can refer to brightness relative to maximum brightness. Brightness can refer to brightness per unit area (m²). 2 The luminous intensity (cd) of the backlight unit 120. The maximum brightness can correspond to the brightness at the initial stage of operation (e.g., the starting point of operation). The brightness can gradually decrease as the operation time increases.

[0129] Red LED 210, green LED 220, and blue LED 230 can be arranged along the width direction. The red LED 210, green LED 220, and blue LED 230 can be arranged along the width direction regardless of their order. For example, green LED 220, red LED 210, and blue LED 230 can be arranged sequentially along the width direction.

[0130] Red LED 210, green LED 220, and blue LED 230 can be in contact with each other along their arrangement direction. For example, green LED 220, red LED 210, and blue LED 230 can be arranged sequentially without gaps. Adjacent sides of red LED 210, green LED 220, and blue LED 230 can overlap. For example, one side of green LED 220 can overlap with one side of red LED 210, and the other side of red LED 210 can overlap with one side of blue LED 230. The light-emitting areas of red LED 210, green LED 220, and blue LED 230 can be continuously arranged. The light-emitting surfaces of red LED 210, green LED 220, and blue LED 230 can form a single light-emitting surface.

[0131] In a plan view, the red LED 210, green LED 220, and blue LED 230 can form the perimeter of a quadrilateral. For example, in a plan view, the red LED 210, green LED 220, and blue LED 230 can form the perimeter of a square. The upper edges of the red LED 210, green LED 220, and blue LED 230 can form one side of the light source 200, and the lower edges of the red LED 210, green LED 220, and blue LED 230 can form the other side of the light source 200. The upper edges of the red LED 210, green LED 220, and blue LED 230 can be arranged continuously. Additionally, the lower edges of the red LED 210, green LED 220, and blue LED 230 can be arranged continuously.

[0132] In a plan view, the light source 200 may have a quadrilateral shape. The sum of the widths Lr, Lg, and Lb of the red LED 210, green LED 220, and blue LED 230 may correspond to the width of the light source 200. The length L2 of the red, green, or blue LED 230 may correspond to the length L2 of the light source 200. For example, the length L2 of the light source 200 may correspond to approximately 0.75 to approximately 1.25 times the width L1 of the light source 200.

[0133] In a plan view, the light source 200 may have a square shape. For example, the width L1 of the light source 200 may be substantially the same as the length L2 of the light source 200. For example, the sum L1 of the widths Lr, Lg, and Lb of the red light-emitting diode 210, the green light-emitting diode 220, and the blue light-emitting diode 230 may be substantially the same as the length L2 of the red light-emitting diode, the green light-emitting diode, or the blue light-emitting diode 230.

[0134] Therefore, the light emission distributions of the red LED 210, the green LED 220, and the blue LED 230 can overlap to the maximum extent. The light emission distribution can refer to the sum of the paths of the light emitted by the LEDs.

[0135] In addition, it can improve the white light realization performance of light source 200.

[0136] Alternatively, a backlight unit 120 for a display device can be provided that can improve color separation phenomena.

[0137] Alternatively, a backlight unit 120 for a display device that can expand the viewing angle can be provided.

[0138] Alternatively, a backlight unit 120 for a display device that can reduce the size of the light source 200 can be provided.

[0139] Will Figure 15 and Figure 14 Referring also, the backlight unit 120 for the display device may further include at least one electrode pad provided between the light source 200 and the substrate 122. The at least one electrode pad may include a first electrode pad 251 that electrically connects a red light-emitting diode 210 to the substrate 122, a second electrode pad 252 that electrically connects a green light-emitting diode 220 to the substrate 122, and a third electrode pad 253 that electrically connects a blue light-emitting diode 230 to the substrate 122.

[0140] A first electrode pad 251 may be provided below the red light-emitting diode 210. The red light-emitting diode 210 may cover the first electrode pad 251. For example, the red light-emitting diode 210 may completely cover the first electrode pad 251. In a plan view, the first electrode pad 251 may completely overlap with the red light-emitting diode 210. For example, in a plan view, the first electrode pad 251 may be located inside the frame of the red light-emitting diode 210.

[0141] The first electrode pad 251 can be electrically connected to the electrode pattern of the substrate 122. The first electrode pad 251 can contact the red light-emitting diode 210 and the substrate 122.

[0142] The first electrode pad 251 may include a pair of first electrode pads 251a and 251b electrically connected to the red light-emitting diode 210. The pair of first electrode pads 251a and 251b may correspond to different electrodes. For example, one of the first electrode pads 251a and 251b may correspond to the positive electrode, and the other of the first electrode pads 251a and 251b may correspond to the negative electrode.

[0143] A pair of first electrode pads 251a and 251b can be separated from each other. For example, a pair of first electrode pads 251a and 251b can be separated from each other along the length of the red light-emitting diode 210. The spacing v1 between a pair of first electrode pads 251a and 251b can be greater than or equal to about 100 micrometers (μm). For example, the spacing v1 between a pair of first electrode pads 251a and 251b can be greater than or equal to about 150 micrometers.

[0144] The second electrode pad 252 may be provided below the green light-emitting diode 220. The green light-emitting diode 220 may cover the second electrode pad 252. For example, the green light-emitting diode 220 may completely cover the second electrode pad 252. In a plan view, the second electrode pad 252 may completely overlap with the green light-emitting diode 220. For example, in a plan view, the second electrode pad 252 may be located inside the frame of the green light-emitting diode 220.

[0145] The second electrode pad 252 can be electrically connected to the electrode pattern of the substrate 122. The second electrode pad 252 can contact the green light-emitting diode 220 and the substrate 122.

[0146] The second electrode pad 252 may include a pair of second electrode pads 252a and 252b electrically connected to the green light-emitting diode 220. The pair of second electrode pads 252a and 252b may correspond to different electrodes. For example, one of the pair of second electrode pads 252a and 252b, 252a, may correspond to the positive electrode, and the other of the pair of second electrode pads 252a and 252b may correspond to the negative electrode.

[0147] A pair of second electrode pads 252a and 252b can be separated from each other. For example, a pair of second electrode pads 252a and 252b can be separated from each other along the length of the green light-emitting diode 220. The spacing v2 between a pair of second electrode pads 252a and 252b can be greater than or equal to about 100 micrometers. For example, the spacing v2 between a pair of second electrode pads 252a and 252b can be greater than or equal to about 150 micrometers.

[0148] A third electrode pad 253 may be provided below the blue light-emitting diode 230. The blue light-emitting diode 230 may cover the third electrode pad 253. For example, the blue light-emitting diode 230 may completely cover the third electrode pad 253. In a plan view, the third electrode pad 253 may completely overlap with the blue light-emitting diode 230. For example, in a plan view, the third electrode pad 253 may be located inside the frame of the blue light-emitting diode 230.

[0149] The third electrode pad 253 can be electrically connected to the electrode pattern of the substrate 122. The third electrode pad 253 can contact the blue light-emitting diode 230 and the substrate 122.

[0150] The third electrode pad 253 may include a pair of third electrode pads 253a and 253b electrically connected to the blue light-emitting diode 230. The pair of third electrode pads 253a and 253b may correspond to different electrodes. For example, one of the pair of third electrode pads 253a and 253b, 253a, may correspond to the positive electrode, and the other of the pair of third electrode pads 253a and 253b may correspond to the negative electrode.

[0151] A pair of third electrode pads 253a and 253b can be separated from each other. For example, a pair of third electrode pads 253a and 253b can be separated from each other along the length of the blue light-emitting diode 230. The spacing v3 between a pair of third electrode pads 253a and 253b can be greater than or equal to about 100 micrometers. For example, the spacing v3 between a pair of third electrode pads 253a and 253b can be greater than or equal to about 150 micrometers.

[0152] Thus, a pair of electrode pads 251, 252, and 253 can be electrically connected to each other.

[0153] The first electrode pads to the third electrode pads 251, 252, and 253 can be separated from each other. For example, the first electrode pads to the third electrode pads 251, 252, and 253 can be separated from each other along the arrangement direction or width direction of the red light-emitting diode 210, the green light-emitting diode 220, and the blue light-emitting diode 230. For example, the intervals a12, a13, b12, and b13 between the first electrode pads to the third electrode pads 251, 252, and 253 can be greater than or equal to approximately 100 micrometers. The intervals a12 and b12 between the first electrode pad 251 and the second electrode pad 252 can be greater than or equal to approximately 100 micrometers. In addition, the intervals a13 and b13 between the first electrode pad 251 and the third electrode pad 253 can be greater than or equal to approximately 100 micrometers.

[0154] Specifically, the first electrode pad 251 can be separated from the side of the red light-emitting diode 210. For example, the spacing p12, q12 between the first electrode pad 251 and one side of the red light-emitting diode 210 can be greater than or equal to about 50 micrometers. In addition, the spacing p13, q13 between the first electrode pad 251 and the other side of the red light-emitting diode 210 can be greater than or equal to about 50 micrometers.

[0155] The second electrode pad 252 can be separated from one side of the green light-emitting diode 220. The second electrode pad 252 can be adjacent to the other side of the green light-emitting diode 220. The other side of the green light-emitting diode 220 can be opposite to one side. For example, the spacing p2, q2 between the second electrode pad 252 and one side of the green light-emitting diode 220 can be greater than or equal to about 50 micrometers.

[0156] The third electrode pad 253 can be separated from one side of the blue light-emitting diode 230. The third electrode pad 253 can be adjacent to the other side of the blue light-emitting diode 230. The other side of the blue light-emitting diode 230 can be opposite to the side. For example, the spacing p3, q3 between the third electrode pad 253 and one side of the blue light-emitting diode 230 can be greater than or equal to about 50 micrometers.

[0157] Therefore, the first electrode pads to the third electrode pads 251, 252, and 253 can be sufficiently separated from each other. For example, the spacing a12 and b12 between the first electrode pad 251 and the second electrode pad 252 can be greater than or equal to approximately 100 micrometers. The spacing a13 and b13 between the first electrode pad 253a and the third electrode pad 253b can be greater than or equal to approximately 100 micrometers. Therefore, the first electrode pads to the third electrode pads 251, 252, and 253 can be de-electrically connected to each other.

[0158] In addition, the red LED 210, the green LED 220, and the blue LED 230 can receive currents of different magnitudes.

[0159] In addition, the current applied to the red LED 210, green LED 220, and blue LED 230 can be controlled independently.

[0160] Will Figure 16 and Figure 15 Referring also to one embodiment, the backlight unit 120 for the display device may further include a heat dissipation pattern 280 between electrode pads 251, 252, and 253. The heat dissipation pattern 280 may be provided below the light source 200. The heat dissipation pattern 280 may be provided between the substrate 122 and the light source 200. For example, the heat dissipation pattern 280 may be provided below the red light-emitting diode 210, the green light-emitting diode 220, and the blue light-emitting diode 230. The heat dissipation pattern 280 may include an insulating material. The heat dissipation pattern 280 may include a thermally conductive material.

[0161] This allows the heat generated by the light source 200 to be dissipated quickly.

[0162] Alternatively, a backlight unit 120 for a display device can be provided that can reduce the operating temperature of the light source 200.

[0163] Will Figure 17 and Figure 14By referring to the above, we can see the relative luminous flux of the red LED 210, green LED 220, and blue LED 230 as a function of temperature. The relative luminous flux of the red LED 210, green LED 220, and blue LED 230 decreases as the temperature increases. Relative luminous flux refers to the speed of light at a specific temperature relative to its maximum speed of light (e.g., the speed of light at approximately 25 degrees Celsius). The speed of light of the red LED 210, green LED 220, and blue LED 230 has a maximum value at approximately 25 degrees Celsius, and this speed decreases as the temperature increases beyond approximately 25 degrees Celsius.

[0164] On the graph, the red LED 210 and the green LED 220 can have negative slopes less than 0. The slope of the red LED 210 can be less than the slopes of the green LED 220 and the blue LED 230. The absolute value of the slope of the red LED 210 can be greater than the absolute value of the slopes of the green LED 220 and the blue LED 230. The rate of change of the speed of light of the red LED 210 with temperature can be greater than the rate of change of the speed of light of the green LED 220 and the blue LED 230 with temperature. The higher the temperature, the more drastically the relative speed of light of the red LED 210 can decrease. The red LED 210 can exhibit temperature sensitivity.

[0165] The slope of the green LED 220 can be less than that of the blue LED 230. The absolute value of the slope of the green LED 220 can be greater than that of the blue LED 230. The rate of change of the speed of light of the green LED 220 with temperature can be greater than that of the blue LED 230. As the temperature increases, the relative speed of light of the green LED 220 can gradually decrease. The green LED 220 can exhibit temperature sensitivity. The temperature sensitivity of the red LED 210 can be greater than that of the green LED 220.

[0166] The blue LED 230 can have a slope close to 0. The rate of change of the speed of light of the blue LED 230 with temperature can be close to 0. Even as temperature increases, the relative speed of light of the blue LED 230 can remain almost unchanged. The blue LED 230 can be almost temperature-insensitive.

[0167] Therefore, if the temperature increases, the relative light speed and light efficiency of the red light-emitting diode 210 in the light-emitting diodes 210, 220, and 230 of the light source 200 may decrease sharply.

[0168] Furthermore, there is a problem that if the temperature increases, the performance of the white light emitted by the light source may decrease due to the performance limitations of the red LED 210. For example, it may produce white light that is close to green and blue. For example, there is a problem that the white light emitted may have a smaller x-coordinate Cx value or a higher color temperature.

[0169] This may lead to a decrease in the image quality and color performance of the display device. In addition, it may also cause visual fatigue in users.

[0170] Will Figure 18 and Figure 14 Referring to the present invention, if the display device using the backlight unit 120 of an embodiment of the present invention begins to operate, the relative brightness (%) of the backlight unit 120 may gradually decrease over time. Relative brightness (%) can refer to the brightness relative to the maximum brightness (cd / m²). 2 ) brightness (cd / m 2 The maximum brightness can correspond to the brightness at the initial operating start point of the backlight unit 120.

[0171] The specific values ​​of the relative brightness of the backlight unit 120 over time can be expressed as shown in Table 1 below.

[0172] Table 1

[0173] The rate of change of the relative brightness (%) of the backlight unit 120 over time (s), i.e., the rate of change of relative brightness (% / s), can gradually decrease. For example, the relative brightness of the backlight unit 120 can decrease sharply at the beginning of operation, and the rate of decrease can gradually decrease over time. Thus, the relative brightness of the backlight unit 120 can gradually converge to a constant value. For example, after sufficient operating time, the relative brightness of the backlight unit can converge to the range of approximately 85% to approximately 90%.

[0174] Therefore, it can be ensured that the backlight unit 120 for the display device can maintain a level of performance that is above constant.

[0175] Will Figure 19 and Figure 14 Referring to the present invention, if the backlight unit 120 of the display device according to an embodiment of the present invention starts to operate, the x-coordinate Cx of the color coordinates of the displayed light can gradually decrease over time. That is, the proportion of red light can gradually decrease over time.

[0176] The specific value of the x-coordinate Cx in the color coordinates of the backlight unit 120 that changes over time can be represented as shown in Table 2 below.

[0177] Table 2

[0178] The change range ΔCx of the x-coordinate Cx in the color coordinate system over time (s), i.e., the rate of change ΔCx / s, can gradually decrease. For example, if the backlight unit 120 starts working, the x-coordinate Cx in the color coordinate system can decrease sharply in the initial stage of operation, and the rate of decrease can gradually decrease over time. Therefore, the x-coordinate Cx in the color coordinate system of the light implemented by the backlight unit 120 can gradually converge to a constant value. For example, after sufficient working time, the x-coordinate Cx in the color coordinate system of the light implemented by the backlight unit 120 can converge to a range of approximately 0.275 to approximately 0.285.

[0179] Therefore, the backlight unit 120 for the display device can ensure that the x-coordinate Cx is above a constant value.

[0180] Will Figure 20 and Figure 14 Referring to the present invention, if the backlight unit 120 of the display device according to an embodiment of the present invention starts to operate, the y-coordinate Cy in the color coordinates of the displayed light can gradually decrease over time. That is, the proportion of green light can gradually decrease over time.

[0181] The specific value of the y-coordinate Cy in the color coordinates of the backlight unit 120 that changes over time can be represented as shown in Table 3 below.

[0182] Table 3

[0183] The change range ΔCy of the y-coordinate Cy in the color coordinate system over time (s), i.e., the rate of change ΔCy / s, can gradually decrease. For example, if the backlight unit 120 starts working, the x-coordinate Cy in the color coordinate system can decrease sharply in the initial stage of operation, and the decrease can gradually decrease over time. Therefore, the y-coordinate Cy in the color coordinate system of the light implemented by the backlight unit 120 can gradually converge to a constant value. For example, after sufficient working time, the y-coordinate Cy in the color coordinate system of the light implemented by the backlight unit 120 can converge to a range of approximately 0.275 to approximately 0.285.

[0184] Therefore, the backlight unit 120 for the display device can ensure a constant value for the y-coordinate Cx.

[0185] Hereinafter, various embodiments 200a to 200w of the light source of the present invention will be described. The constituent elements of the light sources 200a to 200w of each embodiment may be substantially the same as those of the aforementioned light source 200. That is, the description of the technical solution and technical effects of the aforementioned light source 200 can also be applied to the light sources 200a to 200w described below. For example, the light-emitting area of ​​the red light-emitting diode 210 may be larger than the light-emitting areas of the green light-emitting diode 220 and the blue light-emitting diode 230. In addition, each of the light sources 200a to 200w may have a substantially square shape. Therefore, for ease of explanation, the description will focus on the differences from the aforementioned light source 200.

[0186] Reference Figure 21 and Figure 22 In one embodiment, the red LED 210 may be located at the edge of the arrangement of LEDs 210, 220, and 230. For example, LEDs 210, 220, and 230 may be arranged in the order of red LED 210, green LED 220, and blue LED 230. Conversely, LEDs 210, 220, and 230 may be arranged in the order of blue LED 230, green LED 220, and red LED 210.

[0187] In one embodiment, LEDs 210, 220, and 230 may be arranged in the order of red LED 210, blue LED 230, and green LED 220. Conversely, LEDs 210, 220, and 230 may be arranged in the order of green LED 220, blue LED 230, and red LEDs 220, 230, and 210.

[0188] Therefore, the red LED 210, which has the highest temperature sensitivity, can be separated from the center of the heat-concentrated light sources 200a and 200b. Similarly, the green LED 220, which is also temperature-sensitive, can be separated from the center of the heat-concentrated light source 200b. Thus, the performance degradation of the red LED 210 and green LED 220 caused by temperature rise can be minimized.

[0189] In addition, the blue light-emitting diode 230, which has almost no temperature sensitivity, can be configured in the center of the light source 200b where heat may be concentrated.

[0190] In addition, the heat generated by the red LED 210 and the green LED 220 can be released smoothly.

[0191] In addition, it can improve the white light realization performance of light sources 200a and 200b.

[0192] In addition, it can reduce the operating temperature of light sources 200a and 200b.

[0193] Alternatively, a backlight unit 120 for a display device that can improve color performance and / or brightness can be provided.

[0194] Will Figure 23 and Figure 21 Referring together, a pair of first electrode pads 251a, 251b may be provided below the red light-emitting diode 210. In a plan view, the pair of first electrode pads 251a, 251b may completely overlap with the red light-emitting diode 210. For example, in a plan view, the pair of first electrode pads 251a, 251b may be located inside the frame of the red light-emitting diode 210.

[0195] A pair of first electrode pads 251a and 251b can be separated from each other along the length of the red light-emitting diode 210. The spacing v1 between the pair of first electrode pads 251a and 251b can be greater than or equal to about 100 micrometers. For example, the spacing v1 between the pair of first electrode pads 251a and 251b can be greater than or equal to about 150 micrometers.

[0196] The first electrode pad 251 can be separated from one side of the red light-emitting diode 210. The first electrode pad 251 can be adjacent to the other side of the red light-emitting diode 210. The other side of the red light-emitting diode 210 can be opposite to one side. For example, the spacing p1, q1 between the first electrode pad 251 and one side of the red light-emitting diode 210 can be greater than or equal to about 100 micrometers.

[0197] A pair of second electrode pads 252a and 252b may be provided below the green light-emitting diode 220. In a plan view, the pair of second electrode pads 252a and 252b may completely overlap with the green light-emitting diode 220. For example, in a plan view, the pair of second electrode pads 252a and 252b may be located inside the frame of the green light-emitting diode 220.

[0198] The second electrode pad 252 may be separated from one side of the green LED 220. The second electrode pad 252 may be adjacent to the other side of the green LED 220. The other side of the green LED 220 may be opposite to one side. For example, the spacing p2, q2 between the second electrode pad 252 and one side of the green LED 220 may be greater than or equal to approximately 50 micrometers. In a plan view, the other side of the green LED 220 may overlap with one side of the red LED 210.

[0199] Furthermore, the second electrode pad 252 can be separated from the first electrode pad 251. For example, the second electrode pad 252 can be separated from the first electrode pad 251 along the width direction of the light source 200a. The spacing between the first electrode pad 251 and the second electrode pad 252 can be greater than or equal to approximately 100 micrometers. The spacing between the first electrode pad 251 and the second electrode pad 252 can be greater than the spacing p1, q1 between the first electrode pad 251 and one side of the red light-emitting diode 210.

[0200] A pair of third electrode pads 253a and 253b may be provided below the blue LED 230. In a plan view, the pair of third electrode pads 253a and 253b may completely overlap with the blue LED 230. For example, in a plan view, the pair of third electrode pads 253a and 253b may be located inside the frame of the blue LED 230.

[0201] The third electrode pad 253 can be separated from one side of the blue LED 230. The third electrode pad 253 can be adjacent to the other side of the blue LED 230. The other side of the blue LED 230 can be opposite to one side. One side of the blue LED 230 can overlap with one side of the green LED 220. For example, the spacing p3, q3 between the third electrode pad 253 and one side of the blue LED 230 can be greater than or equal to about 50 micrometers.

[0202] Furthermore, the third electrode pad 253 can be separated from the second electrode pad 252. For example, the third electrode pad 253 can be separated from the second electrode pad 252 along the width direction of the light source 200a. The spacing a23, b23 between the second electrode pad 252 and the third electrode pad 253 can be greater than or equal to about 100 micrometers.

[0203] Therefore, the first electrode pads to the third electrode pads 251, 252, and 253 can be sufficiently separated from each other. For example, the spacing between the first electrode pad 251 and the second electrode pad 252 can be greater than or equal to approximately 100 micrometers. The spacing between the second electrode pad 252 and the third electrode pad 253 can be greater than or equal to approximately 100 micrometers. Thus, the first electrode pads to the third electrode pads 251, 252, and 253 can be de-electrically connected to each other.

[0204] In addition, the red LED 210, the green LED 220, and the blue LED 230 can receive currents of different magnitudes.

[0205] In addition, the current applied to the red LED 210, green LED 220, and blue LED 230 can be controlled independently.

[0206] Reference Figure 24 and Figure 25 The red light-emitting diode 210 may include a first red light-emitting diode 211 and a second red light-emitting diode 212. The first red light-emitting diode 211 and the second red light-emitting diode 212 may extend long. For example, the first red light-emitting diode 211 and the second red light-emitting diode 212 may extend long along the length direction of the light source 200c, 200d.

[0207] The length L2 of the first red LED 211 and the second red LED 212 can be substantially the same as each other. For example, the length L2 of the first red LED 211 and the second red LED 212 can be substantially the same as the length L2 of the light sources 200c and 200d.

[0208] The widths Lr1 and Lr2 of the first red LED 211 and the second red LED 212 can be substantially the same. The widths Lr1 and Lr2 of the first red LED 211 and the second red LED 212 can be measured in the width direction of the light source 200c and 200d.

[0209] The light-emitting areas of the first red LED 211 and the second red LED 212 can be substantially the same. For example, the length L2 and widths Lr1 and Lr2 of the first red LED 211 and the second red LED 212 are substantially the same, therefore, the light-emitting areas of the first red LED 211 and the second red LED 212 can be substantially the same.

[0210] The first red LED 211 and the second red LED 212 can be adjacent to each other. The first red LED 211 and the second red LED 212 can be arranged continuously along the width direction of the light sources 200c and 200d. For example, a green LED 220 or a blue LED 230 may not be disposed between the first red LED 211 and the second red LED 212.

[0211] The first red LED 211 and the second red LED 212 can be separated from each other. The first red LED 211 and the second red LED 212 can be separated from each other along the arrangement direction. For example, the first red LED 211 and the second red LED 212 can be separated from each other along a width direction intersecting the length direction. For example, the spacing dr between the first red LED 211 and the second red LED 212 can be less than or equal to approximately 50 micrometers.

[0212] This improves the heat dissipation performance of the red LED 210. For example, since the first red LED 211 and the second red LED 212 are separated from each other, the concentration of heat generated by the first red LED 211 and the second red LED 212 can be minimized.

[0213] In addition, it can minimize the performance degradation of the red light-emitting diode 210 caused by heat.

[0214] In addition, it can improve the white light performance of the 200c light source.

[0215] In addition, it can reduce the operating temperature of the light source by 200°C.

[0216] Alternatively, a backlight unit 120 for a display device that can improve color performance and / or brightness can be provided.

[0217] The first red LED 211 and the second red LED 212 can be separated from the green LED 220 and the blue LED 230. For example, the first red LED 211, the second red LED 212, the green LED 220, and the blue LED 230 can be arranged in sequence. In one embodiment, the first red LED 211, the second red LED 212, the blue LED 230, and the green LED 220 can be arranged in sequence.

[0218] The second red LED 212 and the green LED 220 can be separated from each other. For example, the spacing d12 between the second red LED 212 and the green LED 220 can be greater than or equal to about 50 micrometers.

[0219] The green LED 220 and the blue LED 230 can be separated from each other. For example, the spacing d23 between the green LED 220 and the blue LED 230 can be less than or equal to about 50 micrometers. The spacing d23 between the green LED and the blue LED 230 can be less than the spacing d12 between the second red LED 212 and the green LED 220.

[0220] The interval dr between the first red LED 211 and the second red LED 212 can be less than the interval d12 between the second red LED 212 and the green LED 220. The interval dr between the first red LED 211 and the second red LED 212 can be less than or equal to the interval d23 between the green LED 220 and the blue LED 230.

[0221] The light source 200c can have a quadrilateral shape. For example, the width L1 of the light source 200c can be approximately 0.8 to approximately 1.25 times the length L2 of the light source 200c. The width L1 of the light source 200c can correspond to the sum of the widths Lr1, Lr2, Lg, Lb of the light-emitting diodes 210, 220, and 230 and the intervals dr, d12, d23 between the plurality of light-emitting diodes. For example, the width L1 of the light source 200c can correspond to the sum of the widths Lr1, Lr2, Lg, Lb of the light-emitting diodes 210, 220, and 230, the interval dr between the first red light-emitting diode 211 and the second red light-emitting diode 212, the interval d12 between the second red light-emitting diode 212 and the green light-emitting diode 220, and the interval d23 between the green light-emitting diode 220 and the blue light-emitting diode 230.

[0222] The length L2 of the light source 200c can correspond to the length of one of the light-emitting diodes 210, 220, and 230. For example, the lengths L2 of the light-emitting diodes 210, 220, and 230 can be substantially the same as each other, and the length L2 of the light source 200 can correspond to the length L2 of the first red light-emitting diode 211.

[0223] The light source 200c can have a square shape. The width L2 of the light source 200c can be substantially the same as the length L1 of the light source 200.

[0224] Will Figure 26 and Figure 24 Referring together, a pair of first electrode pads 2511a, 2511b can be provided below the first red light-emitting diode 211. Another pair of first electrode pads 2512a, 2512b can be provided below the second red light-emitting diode 212.

[0225] In a plan view, a pair of first electrode pads 2511a, 2511b can completely overlap with the first red light-emitting diode 211. For example, in a plan view, a pair of first electrode pads 2511a, 2511b can be located inside the frame of the first red light-emitting diode 211.

[0226] In a plan view, another pair of first electrode pads 2512a, 2512b may completely overlap with the second red LED 212. For example, in a plan view, the other pair of first electrode pads 2512a, 2512b may be located inside the frame of the second red LED 212.

[0227] A pair of first electrode pads 2511a, 2511b may be separated from one side of the first red light-emitting diode 211. The pair of first electrode pads 2511a, 2511b may be adjacent to the other side of the first red light-emitting diode 211. For example, the spacing p11, q11 between the pair of first electrode pads 2511a, 2511b and one side of the first red light-emitting diode 211 may be greater than or equal to approximately 50 micrometers.

[0228] Another pair of first electrode pads 2512a, 2512b can be separated from one side of the second red LED 212. The other pair of first electrode pads 2512a, 2512b can be adjacent to the other side of the second red LED 212. For example, the spacing p12, q12 between the other pair of first electrode pads 2512a, 2512b and one side of the second red LED 212 can be greater than or equal to approximately 50 micrometers. The other side of the second red LED 212 can be adjacent to the other side of the first red LED 211.

[0229] A pair of second electrode pads 252a and 252b may be provided below the green light-emitting diode 220. In a plan view, the pair of second electrode pads 252a and 252b may completely overlap with the green light-emitting diode 220. For example, in a plan view, the pair of second electrode pads 252a and 252b may be located inside the frame of the green light-emitting diode 220.

[0230] The second electrode pad 252 can be separated from one side of the green LED 220. The second electrode pad 252 can be adjacent to the other side of the green LED 220. The other side of the green LED 220 can be opposite to one side. For example, the spacing p2, q2 between the second electrode pad 252 and one side of the green LED 220 can be greater than or equal to approximately 50 micrometers. In a plan view, the other side of the green LED 220 can be adjacent to one side of the red LED 210.

[0231] Additionally, the second electrode pad 252 can be separated from the first electrode pad 251. For example, the second electrode pad 252 can be separated from the first electrode pad 251 along the width direction of the light source 200. The spacing a12 between the first electrode pad 251 and the second electrode pad 252 can be greater than or equal to approximately 100 micrometers.

[0232] A pair of third electrode pads 253a and 253b may be provided below the blue LED 230. In a plan view, the pair of third electrode pads 253a and 253b may completely overlap with the blue LED 230. For example, in a plan view, the pair of third electrode pads 253a and 253b may be located inside the frame of the blue LED 230.

[0233] The third electrode pad 253 can be separated from one side of the blue LED 230. The third electrode pad 253 can be adjacent to the other side of the blue LED 230. The other side of the blue LED 230 can be opposite to one side. For example, the spacing p3, q3 between the third electrode pad 253 and one side of the blue LED 230 can be greater than or equal to approximately 50 micrometers. One side of the blue LED 230 can be adjacent to one side of the green LED 220.

[0234] Additionally, the third electrode pad 253 can be separated from the second electrode pad 252. For example, the second electrode pad 253 can be separated from the second electrode pad 252 along the width direction of the light source 200. The spacing a23 between the second electrode pad 252 and the third electrode pad 253 can be greater than or equal to approximately 100 micrometers.

[0235] Therefore, the first electrode pads to the third electrode pads 251, 252, and 253 can be sufficiently separated from each other. For example, the spacing a12 between the first electrode pad 251 and the second electrode pad 252 can be greater than or equal to approximately 100 micrometers. The spacing a23 between the second electrode pad 252 and the third electrode pad 253 can be greater than or equal to approximately 100 micrometers. Thus, the first electrode pads to the third electrode pads 251, 252, and 253 can be de-electrically connected to each other.

[0236] In addition, the red LED 210, the green LED 220, and the blue LED 230 can receive currents of different magnitudes.

[0237] In addition, the current applied to the red LED 210, green LED 220, and blue LED 230 can be controlled independently.

[0238] Figures 27 to 29 The constituent elements of light sources 200e and 200f described herein are substantially the same as those of light sources 200, 200a to 200d. Furthermore, the descriptions of the technical solutions and effects of the aforementioned light sources 200, 200a to 200d can also be applied to the light sources 200e and 200f described below. Therefore, for ease of explanation, the description will focus on the differences from the aforementioned light sources 200, 200a to 200d.

[0239] Reference Figure 27 and Figure 28 The first red LED 211 and the second red LED 212 can be further separated. For example, the distance dr between the first red LED 211 and the second red LED 212 can be greater than or equal to about 50 micrometers.

[0240] This further improves the heat dissipation performance of the red LED 210. For example, by further separating the first red LED 211 and the second red LED 212 from each other, the concentration of heat generated by the first red LED 211 and the second red LED 212 can be minimized.

[0241] In addition, it can minimize the performance degradation of the red light-emitting diode 210 caused by heat.

[0242] In addition, it can improve the white light performance of the 200e light source.

[0243] In addition, it can reduce the operating temperature of the light source by 200°C.

[0244] Alternatively, a backlight unit 120 for a display device that can improve color performance and / or brightness can be provided.

[0245] Will Figure 29 and Figure 27 Referring together, a pair of first electrode pads 2511a, 2511b can be separated from the other side of the first red light-emitting diode 211. The pair of first electrode pads 2511a, 2511b can be adjacent to one side of the first red light-emitting diode 211. For example, the spacing p11, q11 between the pair of first electrode pads 2511a, 2511b and the first red light-emitting diode 211 and the other side can be greater than or equal to approximately 50 micrometers.

[0246] Another pair of first electrode pads 2512a, 2512b can be separated from one side of the second red LED 212. The other pair of first electrode pads 2512a, 2512b can be adjacent to the other side of the second red LED 212. For example, the spacing p12, q12 between the other pair of first electrode pads 2512a, 2512b and one side of the second red LED 212 can be greater than or equal to approximately 50 micrometers. The other side of the second red LED 212 can be adjacent to the other side of the first red LED 211.

[0247] The pair of first electrode pads 2511a, 2511b and the other pair of first electrode pads 2512a, 2512b can be further separated. For example, the spacing ar, br between the pair of first electrode pads 2511a, 2511b and the other pair of first electrode pads 2512a, 2512b can be greater than or equal to about 100 micrometers.

[0248] Reference Figure 30A red LED 210 can be provided between the green LED 220 and the blue LED 230. A first red LED 211 and a second red LED 212 can be provided between the green LED 220 and the blue LED 230. For example, the blue LED 230, the first red LED 211, the second red LED 212, and the blue LED 230 can be arranged in sequence.

[0249] The first red LED 211 and the second red LED 212 can be adjacent to each other. The first red LED 211 and the second red LED 212 can be arranged continuously.

[0250] The first red LED 211 and the second red LED 212 can be separated from each other. The first red LED 211 and the second red LED 212 can be separated from each other along the arrangement direction. For example, the spacing dr between the first red LED 211 and the second red LED 212 can be less than or equal to about 50 micrometers.

[0251] The blue LED 230 and the red LED 210 can be separated from each other. The spacing d13 between the blue LED 230 and the first red LED 211 can be less than or equal to about 50 micrometers.

[0252] The green LED 220 and the red LED 210 can be separated from each other. The spacing d12 between the green LED 220 and the second red LED 212 can be less than or equal to about 50 micrometers.

[0253] Reference Figure 30 and Figure 31 Each of the light-emitting diodes 210, 220, and 230 can be provided in multiples. The first red light-emitting diode 211 can be replaced by a pair of first red light-emitting diodes 211a and 211b. The pair of first red light-emitting diodes 211a and 211b can extend long along the length of the light source 200h and be separated from each other. The spacing Lab between the pair of first red light-emitting diodes 211a and 211b can be less than or equal to about 50 micrometers.

[0254] The second red LED 212 can be replaced by a pair of second red LEDs 212a and 212b. The pair of second red LEDs 212a and 212b can extend long along the length of the light source 200 and be separated from each other. The spacing Lab between the pair of second red LEDs 212a and 212b can be less than or equal to about 50 micrometers.

[0255] The blue LED 230 can be replaced by a pair of blue LEDs 230a and 230b. The pair of blue LEDs 230a and 230b can extend long along the length of the light source 200h and be separated from each other. The spacing Lab between the pair of blue LEDs 230a and 230b can be less than or equal to about 50 micrometers.

[0256] The green LED 220 can be replaced by a pair of green LEDs 220a and 220b. The pair of green LEDs 220a and 220b can extend long along the length of the light source 200h and be spaced apart from each other. The spacing Lab between the pair of green LEDs 220a and 220b can be less than or equal to about 50 micrometers.

[0257] Will Figure 32 and Figure 30 Referring together, a pair of first electrode pads 2511a, 2511b can be provided below the first red light-emitting diode 211. Another pair of first electrode pads 2512a, 2512b can be provided below the second red light-emitting diode 212.

[0258] In a plan view, a pair of first electrode pads 2511a, 2511b can completely overlap with the first red light-emitting diode 211. For example, in a plan view, a pair of first electrode pads 2511a, 2511b can be located inside the frame of the first red light-emitting diode 211.

[0259] In a plan view, another pair of first electrode pads 2512a, 2512b may completely overlap with the second red LED 212. For example, in a plan view, the other pair of first electrode pads 2512a, 2512b may be located inside the frame of the second red LED 212.

[0260] A pair of first electrode pads 2511a, 2511b may be separated from one side of the first red light-emitting diode 211. The pair of first electrode pads 2511a, 2511b may be adjacent to the other side of the first red light-emitting diode 211. For example, the spacing p11, q11 between the pair of first electrode pads 2511a, 2511b and one side of the first red light-emitting diode 211 may be greater than or equal to approximately 50 micrometers.

[0261] Another pair of first electrode pads 2512a, 2512b can be separated from one side of the second red LED 212. The other pair of first electrode pads 2512a, 2512b can be adjacent to the other side of the second red LED 212. For example, the spacing p12, q12 between the other pair of first electrode pads 2512a, 2512b and one side of the second red LED 212 can be greater than or equal to approximately 50 micrometers. The other side of the second red LED 212 can be adjacent to the other side of the first red LED 211.

[0262] A pair of first electrode pads 2511a, 2511b and another pair of first electrode pads 2512a, 2512b can be separated from each other. For example, the spacing between a pair of first electrode pads 2511a, 2511b and another pair of first electrode pads 2512a, 2512b can be less than or equal to about 100 micrometers. The spacing between a pair of first electrode pads 2511a, 2511b and another pair of first electrode pads 2512a, 2512b can be greater than the spacing dr between the first red light-emitting diode 211 and the second red light-emitting diode 212.

[0263] A pair of second electrode pads 252a and 252b may be provided below the green light-emitting diode 220. In a plan view, the pair of second electrode pads 252a and 252b may completely overlap with the green light-emitting diode 220. For example, in a plan view, the pair of second electrode pads 252a and 252b may be located inside the frame of the green light-emitting diode 220.

[0264] The second electrode pad 252 can be separated from one side of the green LED 220. The second electrode pad 252 can be adjacent to the other side of the green LED 220. The other side of the green LED 220 can be opposite to one side. For example, the spacing p2, q2 between the second electrode pad 252 and one side of the green LED 220 can be greater than or equal to approximately 50 micrometers. In a plan view, one side of the green LED 220 can be adjacent to one side of the second red LED 212.

[0265] Furthermore, the second electrode pads 252a and 252b can be separated from the other pair of first electrode pads 2512a and 2512b. For example, the second electrode pads 252a and 252b can be separated from the other pair of first electrode pads 2512a and 2512b along the width direction of the light source 200g. The spacing a12 and b12 between the other pair of first electrode pads 2512a and 2512b and the second electrode pads 252a and 252b can be greater than or equal to approximately 100 micrometers.

[0266] A pair of third electrode pads 253a and 253b may be provided below the blue LED 230. In a plan view, the pair of third electrode pads 253a and 253b may completely overlap with the blue LED 230. For example, in a plan view, the pair of third electrode pads 253a and 253b may be located inside the frame of the blue LED 230.

[0267] The third electrode pad 253 can be separated from one side of the blue light-emitting diode 230. The third electrode pad 253 can be adjacent to the other side of the blue light-emitting diode 230. The other side of the blue light-emitting diode 230 can be opposite to one side. One side of the blue light-emitting diode 230 can be adjacent to one side of the first red light-emitting diode 211. For example, the spacing p3, q3 between the third electrode pad 253 and one side of the blue light-emitting diode 230 can be greater than or equal to about 50 micrometers.

[0268] Furthermore, the third electrode pads 253a and 253b can be separated from the pair of first electrode pads 2511a and 2511b. For example, the third electrode pads 253a and 253b can be separated from the pair of first electrode pads 2511a and 2511b along the width direction of the light source 200g. The spacing a13 and b13 between the pair of first electrode pads 2511a and 2511b and the third electrode pads 253a and 253b can be greater than or equal to approximately 100 micrometers.

[0269] Therefore, the first electrode pads to the third electrode pads 2511, 2512, 252, and 253 can be sufficiently separated from each other. For example, the spacing a12 and b12 between the first electrode pad 2512 and the second electrode pad 252 can be greater than or equal to approximately 100 micrometers. The spacing a13 and b13 between the first electrode pad 2511 and the third electrode pad 253 can be greater than or equal to approximately 100 micrometers. Thus, the first electrode pads to the third electrode pads 2511, 2512, 252, and 253 can be without electrical connection to each other.

[0270] In addition, the red LED 210, the green LED 220, and the blue LED 230 can receive currents of different magnitudes.

[0271] In addition, the current applied to the red LED 210, green LED 220, and blue LED 230 can be controlled independently.

[0272] Reference Figures 33 to 35The first red LED 211 and the second red LED 212 can also be arranged discontinuously. The blue LED 220 or the green LED 230 can be positioned between the first red LED 211 and the second red LED 212. For example, the first red LED 211, the blue LED 230, the second red LED 212, and the green LED 220 can be arranged sequentially. Alternatively, the first red LED 211, the green LED 220, the second red LED 212, and the blue LED 230 can also be arranged sequentially.

[0273] The blue LED 230 can be disposed between the first red LED 211 and the second red LED 212. The blue LED 230 can be adjacent to the first red LED 211. The blue LED 230 can also be separated from the first red LED 211. For example, the spacing d13 between the blue LED 230 and the first red LED 211 can be less than or equal to about 50 micrometers.

[0274] The blue LED 230 can be adjacent to the second red LED 212. The blue LED 230 can also be separated from the second red LED 212. For example, the distance d31 between the blue LED 230 and the second red LED 212 can be greater than or equal to approximately 100 micrometers. The distance d31 between the blue LED 230 and the second red LED 212 can be greater than the distance d13 between the blue LED 230 and the first red LED 211.

[0275] The green LED 220 can be adjacent to the second red LED 212. The green LED 220 can also be separated from the second red LED 212. For example, the spacing d12 between the green LED 220 and the second red LED 212 can be less than or equal to about 50 micrometers.

[0276] In one embodiment, LEDs 210, 220, and 230 may each be provided in plurality of units. A first red LED 211 may be replaced by a pair of first red LEDs 211a and 211b. The pair of first red LEDs 211a and 211b may extend elongatedly along the length of the light source 200 and be spaced apart from each other. The spacing Lab between the pair of first red LEDs 211a and 211b may be less than or equal to approximately 50 micrometers.

[0277] The second red LED 212 can be replaced by a pair of second red LEDs 212a and 212b. The pair of second red LEDs 212a and 212b can extend long along the length of the light source 200 and be separated from each other. The spacing Lab between the pair of second red LEDs 212a and 212b can be less than or equal to about 50 micrometers.

[0278] The blue LED 230 can be replaced by a pair of blue LEDs 230a and 230b. The pair of blue LEDs 230a and 230b can extend long along the length of the light source 200 and be spaced apart from each other. The spacing Lab between the pair of blue LEDs 230a and 230b can be less than or equal to about 50 micrometers.

[0279] The green LED 220 can be replaced by a pair of green LEDs 220a and 220b. The pair of green LEDs 220a and 220b can extend long along the length of the light source 200 and be spaced apart from each other. The spacing Lab between the pair of green LEDs 220a and 220b can be less than or equal to about 50 micrometers.

[0280] Will Figure 36 and Figure 33 Referring together, a pair of first electrode pads 2511a, 2511b can be provided below the first red light-emitting diode 211. Another pair of first electrode pads 2512a, 2512b can be provided below the second red light-emitting diode 212.

[0281] In a plan view, a pair of first electrode pads 2511a, 2511b can completely overlap with the first red light-emitting diode 211. For example, in a plan view, a pair of first electrode pads 2511a, 2511b can be located inside the frame of the first red light-emitting diode 211.

[0282] In a plan view, another pair of first electrode pads 2512a, 2512b may completely overlap with the second red LED 212. For example, in a plan view, the other pair of first electrode pads 2512a, 2512b may be located inside the frame of the second red LED 212.

[0283] A pair of first electrode pads 2511a, 2511b may be separated from one side of the first red light-emitting diode 211. The pair of first electrode pads 2511a, 2511b may be adjacent to the other side of the first red light-emitting diode 211. For example, the spacing p11, q11 between the pair of first electrode pads 2511a, 2511b and one side of the first red light-emitting diode 211 may be greater than or equal to approximately 50 micrometers.

[0284] Another pair of first electrode pads 2512a, 2512b can be separated from one side of the second red LED 212. The other pair of first electrode pads 2512a, 2512b can be adjacent to the other side of the second red LED 212. For example, the spacing p12, q12 between the other pair of first electrode pads 2512a, 2512b and one side of the second red LED 212 can be greater than or equal to approximately 50 micrometers. The other side of the second red LED 212 can be adjacent to the other side of the first red LED 211.

[0285] A pair of second electrode pads 252a and 252b may be provided below the green light-emitting diode 220. In a plan view, the pair of second electrode pads 252a and 252b may completely overlap with the green light-emitting diode 220. For example, in a plan view, the pair of second electrode pads 252a and 252b may be located inside the frame of the green light-emitting diode 220.

[0286] The second electrode pad 252 can be separated from one side of the green LED 220. The second electrode pad 252 can be adjacent to the other side of the green LED 220. The other side of the green LED 220 can be opposite to one side. For example, the spacing p2, q2 between the second electrode pad 252 and one side of the green LED 220 can be greater than or equal to about 50 micrometers. One side of the green LED 220 can be adjacent to one side of the first red LED 211.

[0287] Additionally, the second electrode pads 252a and 252b can be separated from the pair of first electrode pads 2511a and 2511b. For example, the second electrode pads 252a and 252b can be separated from the pair of first electrode pads 2511a and 2511b along the width direction of the light source 200k. The spacing a12 and b12 between the pair of first electrode pads 2511a and 2511b and the second electrode pads 252a and 252b can be greater than or equal to approximately 100 micrometers.

[0288] A pair of third electrode pads 253a and 253b may be provided below the blue LED 230. In a plan view, the pair of third electrode pads 253a and 253b may completely overlap with the blue LED 230. For example, in a plan view, the pair of third electrode pads 253a and 253b may be located inside the frame of the blue LED 230.

[0289] The third electrode pad 253 can be separated from one side of the blue LED 230. The third electrode pad 253 can be adjacent to the other side of the blue LED 230. The other side of the blue LED 230 can be opposite to one side. For example, the spacing p3, q3 between the third electrode pad 253 and one side of the blue LED 230 can be greater than or equal to about 50 micrometers. One side of the blue LED 230 can be adjacent to one side of the second red LED 212.

[0290] Additionally, the third electrode pads 253a and 253b can be separated from the other pair of first electrode pads 2512a and 2512b. For example, the third electrode pads 253a and 253b can be separated from the other pair of first electrode pads 2512a and 2512b along the width direction of the light source 200k. The spacing a13 and b13 between the other pair of first electrode pads 2512a and 2512b and the third electrode pads 253a and 2523 can be greater than or equal to approximately 100 micrometers.

[0291] Therefore, the first electrode pads to the third electrode pads 2511, 2512, 252, 253 can be sufficiently separated from each other. For example, the spacing a12, b12 between a pair of first electrode pads 2511a, 2511b and the second electrode pads 252a, 252b can be greater than or equal to about 100 micrometers. The spacing a13, b13 between another pair of first electrode pads 2512a, 2512b and the third electrode pads 253a, 253b can be greater than or equal to about 100 micrometers. Therefore, the first electrode pads to the third electrode pads 251, 252, 253 can be non-electrically connected to each other.

[0292] In addition, the red LED 210, the green LED 220, and the blue LED 230 can receive currents of different magnitudes.

[0293] In addition, the current applied to the red LED 210, green LED 220, and blue LED 230 can be controlled independently.

[0294] Reference Figure 37 and Figure 38 The blue LED 230 and the green LED 220 can be configured between the first red LED 211 and the second red LED 212. For example, the first red LED 211, the blue LED 230, the green LED 220, and the second red LED 212 can be arranged in sequence.

[0295] Therefore, the red LEDs 211 and 212, which are most sensitive to temperature, can be separated from the center of the heat source 200l. This minimizes the performance degradation of the red LEDs 211 and 212 caused by temperature rise.

[0296] In addition, the blue light-emitting diode 230, which has almost no temperature sensitivity, can be configured in the center of the light source 200l where heat may be concentrated.

[0297] In addition, it can smoothly dissipate the heat generated by the red LEDs 211 and 212.

[0298] In addition, it can improve the white light realization performance of the 200l light source.

[0299] In addition, it can reduce the operating temperature of the light source by 200L.

[0300] Alternatively, a backlight unit 120 for a display device that can improve color performance and / or brightness can be provided.

[0301] The blue LED 230 can be disposed between the first red LED 211 and the green LED 220. The blue LED 230 can be adjacent to the first red LED 211. The blue LED 230 can also be separated from the first red LED 211. For example, the spacing d13 between the blue LED 230 and the first red LED 211 can be less than or equal to about 50 micrometers.

[0302] The blue LED 230 can be adjacent to the green LED 220. The blue LED 230 can also be separated from the green LED 220. For example, the distance d23 between the blue LED 230 and the green LED 220 can be greater than or equal to approximately 100 micrometers. The distance d23 between the blue LED 230 and the green LED can be greater than the distance d13 between the blue LED 230 and the first red LED 211.

[0303] A green LED 220 can be disposed between a second red LED 212 and a blue LED 230. The green LED 220 can be adjacent to the second red LED 212. The green LED 220 can also be separated from the second red LED 212. For example, the spacing d12 between the green LED 220 and the second red LED 212 can be less than or equal to approximately 50 micrometers.

[0304] In one embodiment, LEDs 210, 220, and 230 can each be provided in plurality of units. The first red LED 211 can be replaced by a pair of first red LEDs 211a and 211b. The pair of first red LEDs 211a and 211b can extend elongated along the length of the light source 200m and be spaced apart from each other. The spacing Lab between the pair of first red LEDs 211a and 211b can be less than or equal to approximately 50 micrometers.

[0305] The second red LED 212 can be replaced by a pair of second red LEDs 212a and 212b. The pair of second red LEDs 212a and 212b can extend long along the length of the light source 200m and be separated from each other. The spacing Lab between the pair of second red LEDs 212a and 212b can be less than or equal to about 50 micrometers.

[0306] The blue LED 230 can be replaced by a pair of blue LEDs 230a and 230b. The pair of blue LEDs 230a and 230b can extend long along the length of the light source (200m) and be spaced apart from each other. The spacing Lab between the pair of blue LEDs 230a and 230b can be less than or equal to approximately 50 micrometers.

[0307] The green LED 220 can be replaced by a pair of green LEDs 220a and 220b. The pair of green LEDs 220a and 220b can extend long along the length of the light source 200m and be spaced apart from each other. The spacing Lab between the pair of green LEDs 220a and 220b can be less than or equal to about 50 micrometers.

[0308] Will Figure 39 and Figure 37 Referring together, a pair of first electrode pads 2511a, 2511b can be provided below the first red light-emitting diode 211. Another pair of first electrode pads 2512a, 2512b can be provided below the second red light-emitting diode 212.

[0309] In a plan view, a pair of first electrode pads 2511a, 2511b can completely overlap with the first red light-emitting diode 211. For example, in a plan view, a pair of first electrode pads 2511a, 2511b can be located inside the frame of the first red light-emitting diode 211.

[0310] In a plan view, another pair of first electrode pads 2512a, 2512b may completely overlap with the second red LED 212. For example, in a plan view, the other pair of first electrode pads 2512a, 2512b may be located inside the frame of the second red LED 212.

[0311] A pair of first electrode pads 2511a, 2511b may be separated from one side of the first red light-emitting diode 211. The pair of first electrode pads 2511a, 2511b may be adjacent to the other side of the first red light-emitting diode 211. For example, the spacing p11, q11 between the pair of first electrode pads 2511a, 2511b and one side of the first red light-emitting diode 211 may be greater than or equal to approximately 50 micrometers.

[0312] Another pair of first electrode pads 2512a, 2512b can be separated from one side of the second red LED 212. The other pair of first electrode pads 2512a, 2512b can be adjacent to the other side of the second red LED 212. For example, the spacing p12, q12 between the other pair of first electrode pads 2512a, 2512b and one side of the second red LED 212 can be greater than or equal to approximately 50 micrometers.

[0313] A pair of second electrode pads 252a and 252b may be provided below the green light-emitting diode 220. In a plan view, the pair of second electrode pads 252a and 252b may completely overlap with the green light-emitting diode 220. For example, in a plan view, the pair of second electrode pads 252a and 252b may be located inside the frame of the green light-emitting diode 220.

[0314] The second electrode pad 252 can be separated from one side of the green LED 220. The second electrode pad 252 can be adjacent to the other side of the green LED 220. The other side of the green LED 220 can be opposite to one side. For example, the spacing p2, q2 between the second electrode pad 252 and one side of the green LED 220 can be greater than or equal to about 50 micrometers. One side of the green LED 220 can be adjacent to one side of the second red LED 212.

[0315] Furthermore, the second electrode pads 252a and 252b can be separated from the other pair of first electrode pads 2512a and 2512b. For example, the second electrode pads 252a and 252b can be separated from the other pair of first electrode pads 2512a and 2512b along the width direction of the light source 200l. The spacing a12 and b12 between the other pair of first electrode pads 2512a and 2512b and the second electrode pads 252a and 252b can be greater than or equal to approximately 100 micrometers.

[0316] A pair of third electrode pads 253a and 253b may be provided below the blue LED 230. In a plan view, the pair of third electrode pads 253a and 253b may completely overlap with the blue LED 230. For example, in a plan view, the pair of third electrode pads 253a and 253b may be located inside the frame of the blue LED 230.

[0317] The third electrode pad 253 can be separated from one side of the blue LED 230. The third electrode pad 253 can be adjacent to the other side of the blue LED 230. The other side of the blue LED 230 can be opposite to one side. For example, the spacing p3, q3 between the third electrode pad 253 and one side of the blue LED 230 can be greater than or equal to about 50 micrometers. One side of the blue LED 230 can be adjacent to one side of the first red LED 211.

[0318] Additionally, the third electrode pads 253a and 253b can be separated from the pair of first electrode pads 2511a and 2511b. For example, the third electrode pads 253a and 253b can be separated from the pair of first electrode pads 2511a and 2511b along the width direction of the light source 200l. The spacing a13 and b13 between the pair of first electrode pads 2511a and 2511b and the third electrode pads 253a and 253b can be greater than or equal to approximately 100 micrometers.

[0319] Additionally, the third electrode pad 253 can be separated from the second electrode pad 252. For example, the third electrode pad 253 can be separated from the second electrode pad 252 along the width direction of the light source 200l. The spacing d23 between the third electrode pad 253 and the second electrode pad 252 can be greater than or equal to approximately 100 micrometers.

[0320] Therefore, the first electrode pads to the third electrode pads 2511, 2512, 252, 253 can be sufficiently separated from each other. For example, the spacing a12, b12 between another pair of first electrode pads 2512a, 2512b and the second electrode pads 252a, 252b can be greater than or equal to about 100 micrometers. The spacing a13, b13 between a pair of first electrode pads 2511a, 2511b and the third electrode pads 253a, 253b can be greater than or equal to about 100 micrometers. Therefore, the first electrode pads to the third electrode pads 2511, 2512, 252, 253 can be non-electrically connected to each other.

[0321] In addition, the red LED 210, the green LED 220, and the blue LED 230 can receive currents of different magnitudes.

[0322] In addition, the current applied to the red LED 210, green LED 220, and blue LED 230 can be controlled independently.

[0323] Reference Figure 40 The red LED 210 may include a first red LED 211 and a second red LED 212. Similarly, the green LED 220 may include a first green LED 221 and a second green LED 222.

[0324] The first green LED 221 and the second green LED 222 can extend long. For example, the first green LED 221 and the second green LED 222 can extend long along the length direction of the light source 200n.

[0325] The length L2 of the first green LED 221 and the second green LED 222 can be substantially the same as each other. For example, the length L2 of the first green LED 221 and the second green LED 222 can be substantially the same as the length L2 of the light source 200n.

[0326] The widths Lg1 and Lg2 of the first green LED 221 and the second green LED 222 can be substantially the same. The widths Lg1 and Lg2 of the first green LED 221 and the second green LED 222 can be measured in the width direction of the light source 200n.

[0327] The light-emitting areas of the first green LED 221 and the second green LED 222 can be substantially the same. For example, the length L2 and widths Lg1 and Lg2 of the first green LED 221 and the second green LED 222 are substantially the same, therefore the light-emitting areas of the first green LED 221 and the second green LED 222 can be substantially the same.

[0328] The light-emitting area of ​​the first green LED 221 or the second green LED 222 can be smaller than the light-emitting area of ​​the blue LED 230. The sum of the light-emitting areas of the first green LED 221 and the second green LED 222 can be substantially the same as the light-emitting area of ​​the blue LED 230.

[0329] A first green LED 221 and a second green LED 222 can be provided between a first red LED 211 and a second red LED 212. A blue LED 230 can be provided between a first green LED 221 and a second green LED 222. For example, the first red LED 211, the first green LED 221, the blue LED 230, the second green LED 222, and the second red LED 212 can be arranged in sequence.

[0330] Reference Figure 41 The blue light-emitting diode 230 may include a first blue light-emitting diode 231 and a second blue light-emitting diode 232.

[0331] The first blue LED 231 and the second blue LED 232 can extend long. For example, the first blue LED 231 and the second blue LED 232 can extend long along the length direction of the light source 200°.

[0332] The length L2 of the first blue LED 231 and the second blue LED 232 can be substantially the same as each other. For example, the length L2 of the first blue LED 231 and the second blue LED 232 can be substantially the same as the length L2 of the light source 200.

[0333] The widths Lb1 and Lb2 of the first blue LED 231 and the second blue LED 232 can be substantially the same. The widths Lb1 and Lb2 of the first blue LED 231 and the second blue LED 232 can be measured in the width direction of the light source 200°.

[0334] The light-emitting areas of the first blue LED 231 and the second blue LED 232 can be substantially the same. For example, the length L2 and widths Lb1 and Lb2 of the first blue LED 231 and the second blue LED 232 are substantially the same, therefore, the light-emitting areas of the first blue LED 231 and the second blue LED 232 can be substantially the same.

[0335] The light-emitting area of ​​the first blue light-emitting diode 231 or the second blue light-emitting diode 232 can be substantially the same as the light-emitting area of ​​the first green light-emitting diode or the second green light-emitting diode 222.

[0336] A first green LED 221 and a second green LED 222 can be provided between a first blue LED 231 and a second blue LED 232. A red LED 210 can be provided between a first green LED 221 and a second green LED 222. For example, the first blue LED 230, the first green LED 221, the red LED 210, the second green LED 222, and the second blue LED 232 can be arranged in sequence.

[0337] Reference Figure 42 In one embodiment, the red light-emitting diode 210 may include a first red light-emitting diode to a fourth red light-emitting diode 211, 212, 213, 214. The first red light-emitting diodes to the fourth red light-emitting diodes 211, 212, 213, 214 may extend elongatedly. For example, the first red light-emitting diodes to the fourth red light-emitting diodes 211, 212, 213, 214 may extend elongatedly along the length direction of the light source 200p. The lengths La and Lb of the first red light-emitting diodes to the fourth red light-emitting diodes 211, 212, 213, 214 may be substantially the same as each other. However, the lengths La and Lb of the first red light-emitting diodes to the fourth red light-emitting diodes 211, 212, 213, 214 may be less than the length L2 of the light source 200p.

[0338] The widths L12, L13, L11, and L14 of the first to fourth red LEDs 211, 212, 213, and 214 can be substantially the same as each other. The widths L12, L13, L11, and L14 of the first to fourth red LEDs 211, 212, 213, and 214 can be measured in the width direction of the light source 200p.

[0339] The light-emitting areas of the first to fourth red LEDs 211, 212, 213, and 214 can be substantially the same. For example, the lengths La and Lb and the widths L12, L13, L11, and L14 of the first to fourth red LEDs 211, 212, 213, and 214 are substantially the same, therefore the light-emitting areas of the first to fourth red LEDs 211, 212, 213, and 214 can be substantially the same.

[0340] The green light-emitting diode 220 may include a first green light-emitting diode 221 and a second green light-emitting diode 222. The first green light-emitting diode 221 and the second green light-emitting diode 222 may extend elongatedly. For example, the first green light-emitting diode 221 and the second green light-emitting diode 222 may extend elongatedly along the length direction of the light source 200. The lengths La and Lb of the first green light-emitting diode 221 and the second green light-emitting diode 222 may be substantially the same. However, the lengths La and Lb of the first green light-emitting diode 221 and the second green light-emitting diode 222 may be less than the length L2 of the light source 200p.

[0341] The widths L14 and L13 of the first green LED 221 and the second green LED 222 can be substantially the same as each other. The widths L14 and L13 of the first green LED 221 and the second green LED 222 can be measured in the width direction of the light source 200p.

[0342] The light-emitting areas of the first green LED 221 and the second green LED 222 can be substantially the same. For example, the lengths La and Lb and the widths L14 and L13 of the first green LED 221 and the second green LED 222 are substantially the same, therefore, the light-emitting areas of the first green LED 221 and the second green LED 222 can be substantially the same.

[0343] Similarly, the blue light-emitting diode 230 may include a first blue light-emitting diode 230 and a second blue light-emitting diode 232. The first blue light-emitting diode 231 and the second blue light-emitting diode 232 may extend elongatedly. For example, the first blue light-emitting diode 231 and the second blue light-emitting diode 232 may extend elongatedly along the length direction of the light source 200. The lengths La and Lb of the first blue light-emitting diode 231 and the second blue light-emitting diode 232 may be substantially the same. However, the lengths La and Lb of the first blue light-emitting diode 231 and the second blue light-emitting diode 232 may be less than the length L2 of the light source 200p.

[0344] The widths L11 and L12 of the first blue LED 231 and the second blue LED 232 can be substantially the same. The widths L11 and L12 of the first blue LED 231 and the second blue LED 232 can be measured in the width direction of the light source 200p.

[0345] The light-emitting areas of the first blue LED 231 and the second blue LED 232 can be substantially the same. For example, the lengths La and Lb and the widths L11 and L12 of the first blue LED 231 and the second blue LED 232 are substantially the same, therefore, the light-emitting areas of the first blue LED 231 and the second blue LED 232 can be substantially the same.

[0346] The lengths La and Lb of the red LED 210, green LED 220, and blue LED 230 can be the same. The widths L11, L12, L13, and L14 of the red LED 210, green LED 220, and blue LED 230 can be the same. The light-emitting areas of the red LED 210, green LED 220, and blue LED 230 can be the same. For example, the red LED 210, green LED 220, and blue LED 230 can be provided with substantially identical structures.

[0347] The first to fourth red LEDs 211, 212, 213, 214, the first green LED 221, the second green LED 222, and the first blue LED 231 and the second blue LED 232 can be arranged arbitrarily to form a quadrilateral-shaped light source 200p. For example, the first to fourth red LEDs 211, 212, 213, 214, the first green LED 221, the second green LED 222, and the first blue LED 231 and the second blue LED 232 can be arranged arbitrarily to form a square-shaped light source 200p.

[0348] The first to fourth red LEDs 211, 212, 213, 214, the first green LED 221 and the second green LED 222, and the first blue LED 231 and the second blue LED 232 can be arranged in a matrix pattern. For example, the first to fourth red LEDs 211, 212, 213, 214, the first green LED 221 and the second green LED 222, and the first blue LED 231 and the second blue LED 232 can be arranged in a 2x4 matrix pattern.

[0349] The first to fourth red LEDs 211, 212, 213, and 214, the first green LED 221 and the second green LED 222, and the first blue LED 231 and the second blue LED 232 can be evenly distributed. For example, the first red LED 211 and the second red LED 212 can be arranged in the first row of the matrix pattern, and the third red LED 213 and the fourth red LED 214 can be arranged in the second row of the matrix pattern. Additionally, the first green LED 221 can be arranged in the first row of the matrix pattern, and the second green LED 222 can be arranged in the second row of the matrix pattern. Furthermore, the first blue LED 230 can be arranged in the first row of the matrix pattern, and the second blue LED 232 can be arranged in the second row of the matrix pattern.

[0350] Therefore, the light emission distribution of the red LED 210, the light emission distribution of the green LED 220, and the light emission distribution of the blue LED 230 can overlap to the maximum extent.

[0351] In addition, it can improve the performance of white light at 200p.

[0352] Alternatively, a backlight unit 120 for a display device can be provided that can improve color separation phenomena.

[0353] Alternatively, a backlight unit 120 for a display device that can expand the viewing angle can be provided.

[0354] Alternatively, a backlight unit 120 for a display device can be provided that can reduce the size of the light source by 200p.

[0355] Specifically, in the first row of the matrix pattern, the first red LED 211 and the second red LED 212 can be arranged between the first green LED 221 and the first blue LED 231. In the second row of the matrix pattern, the second green LED 222 and the second blue LED 232 can be arranged between the third red LED 213 and the fourth red LED 214.

[0356] Reference Figure 43 In one embodiment, the first red LED 211 and the second red LED 212 can be arranged in the first row of the matrix pattern, and the third red LED 213 and the fourth red LED 214 can be arranged in the second row of the matrix pattern. Additionally, the first blue LED 231 and the second blue LED 232 can be arranged in the first row of the matrix pattern. Furthermore, the first green LED 221 and the second green LED 222 can be arranged in the second row of the matrix pattern.

[0357] Specifically, in the first row of the matrix pattern, the first red LED 211 can be arranged between the first blue LED 231 and the second blue LED 232. Additionally, the second blue LED 232 can be arranged between the first red LED 211 and the second red LED 212. In the second row of the matrix pattern, the first green LED 221 can be arranged between the third red LED 213 and the fourth red LED 214. Additionally, the fourth red LED 214 can be arranged between the first green LED 221 and the second green LED 222.

[0358] Therefore, the light emission distribution of the red LED 210, the light emission distribution of the green LED 220, and the light emission distribution of the blue LED 230 can overlap to the maximum extent.

[0359] In addition, it can improve the white light realization performance of the 200q light source.

[0360] Alternatively, a backlight unit 120 for a display device can be provided that can improve color separation phenomena.

[0361] Alternatively, a backlight unit 120 for a display device that can expand the viewing angle can be provided.

[0362] Alternatively, a backlight unit 120 for a display device can be provided that can reduce the size of the light source by 200q.

[0363] Reference Figure 44 The red LED 210 can extend long. For example, the red LED 210 can have a rectangular shape. The length L2 of the red LED 210 can correspond to the length L2 of the light source 200r. The width L11 of the red LED 210 can correspond to half the width L1 of the light source 200r.

[0364] The green LED 220 and the blue LED 230 can have a substantially square shape. For example, the light-emitting area of ​​the green LED 220 and the blue LED 230 can have a substantially square shape.

[0365] The light-emitting areas of the green LED 220 and the blue LED 230 can be substantially the same. The light-emitting areas of the green LED 220 and the blue LED 230 can be smaller than the light-emitting area of ​​the red LED 210. For example, the light-emitting area of ​​the red LED 210 can be approximately twice the light-emitting area of ​​either the green LED 220 or the blue LED 230. The sum of the light-emitting areas of the green LED 220 and the blue LED 230 can be substantially the same as the light-emitting area of ​​the red LED 210.

[0366] Green LED 220 and blue LED 230 may be adjacent to red LED 210. Green LED 220 and blue LED 230 may be arranged along the length of the light source 200r. The light source 200r may have a substantially square shape. For example, red LED 210, green LED 220, and blue LED 230 may be arranged within a substantially square frame.

[0367] The red LED 210, green LED 220, and blue LED 230 can be in contact with each other. For example, the red LED 210, green LED 220, and blue LED 230 can be arranged without gaps. Adjacent edges of the red LED 210, green LED 220, and blue LED 230 can overlap. The light-emitting surfaces of the red LED 210, green LED 220, and blue LED 230 can form a single light-emitting surface.

[0368] Reference Figure 45 In one embodiment, the red light-emitting diode 210 may include a first red light-emitting diode 211 and a second red light-emitting diode 212. The first red light-emitting diode 211 and the second red light-emitting diode 212 may have a substantially square shape.

[0369] The lengths L21 and L22 of the first red LED 211 and the second red LED 212 can be substantially the same. The widths L11 and L12 of the first red LED 211 and the second red LED 212 can be substantially the same. The widths L11 and L12 of the first red LED 211 and the second red LED 212 can be measured in the width direction of the light source 200s.

[0370] The light-emitting areas of the first red LED 211 and the second red LED 212 can be substantially the same. For example, the lengths L21 and L22 and the widths L11 and L12 of the first red LED 211 and the second red LED 212 are substantially the same, therefore, the light-emitting areas of the first red LED 211 and the second red LED 212 can be substantially the same.

[0371] The light-emitting area of ​​the first red LED or the second red LED 212 can be substantially the same as the light-emitting area of ​​the green or blue-green LED 220.

[0372] Similarly, the first red LED 211 and the second red LED 212, as well as the green LED 220 and the blue LED 230, can be adjacent to each other. The light source 200 can have a substantially square shape. For example, the first red LED 211 and the second red LED 212, as well as the green LED 220 and the blue LED 230, can be arranged within a substantially square frame.

[0373] The first red LED 211, the second red LED 212, the green LED 220, and the blue LED 230 can be in contact with each other. For example, the first red LED 211, the second red LED 212, the green LED 220, and the blue LED 230 can be arranged without gaps. The adjacent sides of the first red LED 211, the second red LED 212, the green LED 220, and the blue LED 230 can overlap. The light-emitting surfaces of the first red LED 211, the second red LED 212, the green LED 220, and the blue LED 230 can form a single light-emitting surface.

[0374] The first red LED 211, the second red LED 212, the green LED 220, and the blue LED 230 can be arranged in a matrix pattern. For example, the first red LED 211, the second red LED 212, the green LED 220, and the blue LED 230 can be arranged in a 2x2 matrix pattern.

[0375] The first red LED 211, the second red LED 212, the green LED 220, and the blue LED 230 can be evenly distributed. For example, the first red LED 211 and the blue LED 230 can be arranged in the first row of the matrix pattern, and the second red LED 212 and the green LED 220 can be arranged in the second row of the matrix pattern.

[0376] Therefore, the light emission distribution of the red LED 210, the light emission distribution of the green LED 220, and the light emission distribution of the blue LED 230 can overlap to the maximum extent.

[0377] In addition, it can improve the white light performance of the light source by 200s.

[0378] Alternatively, a backlight unit 120 for a display device can be provided that can improve color separation phenomena.

[0379] Alternatively, a backlight unit 120 for a display device that can expand the viewing angle can be provided.

[0380] Alternatively, a backlight unit 120 for a display device can be provided that can reduce the size of the light source by 200s.

[0381] Reference Figure 46 The red LED 210 may surround a portion of the periphery of the blue LED 230. The red LED 210 may surround a portion of the periphery of the green LED 220. The red LED 210 may extend elongatedly along the length direction of the light source 200t. The red LED 210 may extend elongatedly along the width direction of the light source 200t. For example, the red LED 210 may extend elongatedly and bend along the length direction of the light source 200t, and may extend elongatedly along the width direction of the light source 200t. The light source 200 may have… "shape.

[0382] The length L21 of the green LED 220 and the blue LED 230 can be shorter than the length of the light source 200t. The length L21 of the green LED 220 and the blue LED 230 can be substantially the same. Furthermore, the widths L11 and L12 of the green LED 220 and the blue LED 230 can be substantially the same. Additionally, the light-emitting areas of the green LED 220 and the blue LED 230 can be substantially the same. The green LED 220 and the blue LED 230 can be arranged continuously. In a plan view, one side of the green LED 220 and the blue LED 230 can overlap.

[0383] Along the width of the light source 200t, a red LED 210, a blue LED 230, and a green LED 220 can be arranged sequentially. The blue LED 230 can be positioned between the red LED 210 and the green LED 220. The length L2 of the red LED 210 can be greater than the length L21 of both the green LED 220 and the blue LED 230. The width L1 of the red LED 210 can be greater than the widths L11 and L12 of both the green LED 220 and the blue LED 230.

[0384] Reference Figures 47 to 49 The red LED 210 may surround the green LED 220 and the blue LED 230. The red LED 210 may extend elongated along the periphery of the light source 200. The red LED 210 may have a ring shape. For example, the red LED 210 may have a square ring shape or a circular ring shape.

[0385] Reference Figure 47The red LED 210 may surround the green LED 220. The red LED 210 may have a square ring shape surrounding the green LED 220. For example, the red LED 210 may have a substantially square ring shape.

[0386] A green LED 220 may surround a blue LED 230. The green LED 220 may have a square ring shape surrounding the blue LED 230. For example, the green LED 220 may have a substantially square ring shape.

[0387] The blue light-emitting diode 230 can be disposed at the center of the light source 200u. The blue light-emitting diode 230 can have a quadrilateral shape. For example, the blue light-emitting diode 230 can have a square shape with its interior filled.

[0388] Therefore, the red LED 210, which has the highest temperature sensitivity, can be positioned furthest from the center of the heat-concentrated light source 200u. Similarly, the green LED 220, which is also temperature-sensitive, can be positioned further from the center of the heat-concentrated light source 200u. Thus, the performance degradation of both the red LED 210 and the green LED 220 caused by temperature increases can be minimized.

[0389] In addition, the blue light-emitting diode 230, which has almost no temperature sensitivity, can be configured in the center of the light source 200u where heat may be concentrated.

[0390] In addition, the heat generated by the red LED 210 and the green LED 220 can be released smoothly.

[0391] In addition, it can improve the white light performance of a 200u light source.

[0392] In addition, it can reduce the operating temperature of the light source by 200u.

[0393] Alternatively, a backlight unit 120 for a display device that can improve color performance and / or brightness can be provided.

[0394] Reference Figure 48In one embodiment, the green LED 220 and the blue LED 230 can extend elongatedly along the length direction of the light source 200. The green LED 220 and the blue LED 230 can be arranged continuously along the width direction of the light source 200. The length L21 of the green LED 220 and the blue LED 230 can be shorter than the length L2 of the light source 200. The length L21 of the green LED 220 and the blue LED 230 can be substantially the same. Furthermore, the widths L11 and L12 of the green LED 220 and the blue LED 230 can be substantially the same. Additionally, the light-emitting areas of the green LED 220 and the blue LED 230 can be substantially the same. The green LED 220 and the blue LED 230 can be arranged continuously. In a plan view, one side of the green LED 220 and the blue LED 230 can overlap.

[0395] The red LED 210 can extend long along the periphery of the quadrilateral shape of the green LED 220 and the blue LED 230.

[0396] Therefore, the red LED 210, which is most temperature sensitive, can be positioned furthest from the center of the heat-concentrated light source 200V. This minimizes the performance degradation of the red LED 210 caused by temperature rise.

[0397] In addition, the blue light-emitting diode 230, which has almost no temperature sensitivity, can be configured in the center of the light source 200V where heat may be concentrated.

[0398] In addition, the heat generated by the red LED 210 can be released smoothly.

[0399] In addition, it can improve the performance of white light from a 200V light source.

[0400] In addition, it can reduce the operating temperature of the light source by 200V.

[0401] Alternatively, a backlight unit 120 for a display device that can improve color performance and / or brightness can be provided.

[0402] Reference Figure 49 The red LED 210 can surround the green LED 220. The red LED 210 can have a ring shape surrounding the green LED 220.

[0403] The green LED 220 may surround the blue LED 230. The green LED 220 may have a ring shape surrounding the blue LED 230.

[0404] The blue light-emitting diode 230 can be disposed at the center of the light source 200. The blue light-emitting diode 230 can have a circular shape. For example, the blue light-emitting diode 230 can have a completely filled circular shape.

[0405] Therefore, the red LED 210, which has the highest temperature sensitivity, can be positioned furthest from the center of the heat-concentrated light source 200W. Similarly, the green LED 220, which is also temperature-sensitive, can be positioned further from the center of the heat-concentrated light source 200W. Thus, the performance degradation of both the red LED 210 and the green LED 220 caused by temperature increases can be minimized.

[0406] In addition, the blue light-emitting diode 230, which has almost no temperature sensitivity, can be configured in the center of the light source 200W where heat may be concentrated.

[0407] In addition, the heat generated by the red LED 210 and the green LED 220 can be released smoothly.

[0408] In addition, it can improve the performance of white light from a 200W light source.

[0409] In addition, it can reduce the operating temperature of the light source by 200W.

[0410] Alternatively, a backlight unit 120 for a display device that can improve color performance and / or brightness can be provided.

[0411] Will Figure 50 and Figure 51 and Figure 14 Together, a plurality of light sources 200 can be arranged in a matrix pattern. The matrix pattern can include a plurality of rows and a plurality of columns. For example, a plurality of light sources 200 can be separated from each other and arranged in a 4x8 matrix pattern. The row spacing and column spacing between the plurality of light sources 200 can be substantially the same.

[0412] The row direction of the matrix pattern can be parallel to the long side of the display device 100. The column direction of the matrix pattern can be parallel to the short side of the display device 100. The number of columns can be greater than the number of rows. However, it is not limited to this; the number of columns can be the same as the number of rows.

[0413] The light-emitting diodes 210, 220, and 230 of the plurality of light sources 200 can be arranged along the row or column direction of the matrix pattern. For example, the green light-emitting diode 220, the red light-emitting diode 210, and the blue light-emitting diode 230 can be arranged along the row direction of the matrix pattern.

[0414] In one embodiment, a plurality of light sources 200 located in the same row can be arranged in the same direction. For example, a plurality of light-emitting diodes (LEDs) of the plurality of light sources 200 located in the first row can be arranged in the row direction in the order of green LED 220, red LED 210, and blue LED 230. This can be referred to as a forward arrangement.

[0415] In the row following the first row of the ascending arrangement, the plurality of light sources 200 can be arranged in reverse order. For example, the plurality of light-emitting diodes (LEDs) of the plurality of light sources 200 in the second row can be arranged along the row direction in the order of blue LEDs, red LEDs 210, and green LEDs 220. This can be referred to as an inverted arrangement.

[0416] An inverted permutation can be reversed relative to a forward permutation in the row direction of the matrix pattern. For example, an inverted permutation can be reversed horizontally relative to a forward permutation.

[0417] The plurality of light sources 200 can be arranged alternately in a forward and reverse order. For example, the plurality of light sources 200 can be arranged alternately in a forward and reverse order in each row. For example, the plurality of light sources 200 arranged in odd-numbered rows can each be arranged in a forward direction, and the plurality of light sources 200 arranged in even-numbered rows can each be arranged in a reverse direction.

[0418] Therefore, the light emission distribution of the red LED 210, the light emission distribution of the green LED 220, and the light emission distribution of the blue LED 230 can overlap to the maximum extent.

[0419] Alternatively, a backlight unit 120a for a display device can be provided that can improve color separation phenomena.

[0420] Alternatively, a backlight unit 120a for a display device can be provided that can improve the performance of white light realization.

[0421] Reference Figure 52 and Figure 53 In one embodiment, a plurality of light sources 200 located in the same column can be arranged in the same direction. For example, the light-emitting diodes of the plurality of light sources 200 located in the first column can be arranged along the column direction in the order of green light-emitting diode 220, red light-emitting diode 210, and blue light-emitting diode 230. This can be referred to as a forward arrangement.

[0422] In the column following the column of the forward arrangement, the plurality of light sources 200 can be arranged in reverse order. For example, the plurality of light-emitting diodes of the plurality of light sources 200 in the second column can be arranged along the column direction in the order of blue light-emitting diodes 210 and green light-emitting diodes 220. This can be referred to as an inverted arrangement.

[0423] A reverse arrangement can be the column-wise inverted version of a matrix pattern relative to a forward arrangement. For example, a reverse arrangement can be the vertical inversion of a forward arrangement.

[0424] The plurality of light sources 200 can be arranged alternately in a forward and reverse order. For example, the plurality of light sources 200 can be arranged alternately in a forward and reverse order in each column. For example, the plurality of light sources 200 arranged in odd-numbered columns can each be arranged in a forward direction, and the plurality of light sources 200 arranged in even-numbered columns can each be arranged in a reverse direction.

[0425] Therefore, the light emission distribution of the red LED 210, the light emission distribution of the green LED 220, and the light emission distribution of the blue LED 230 can overlap to the maximum extent.

[0426] Alternatively, a backlight unit 120c for a display device can be provided that can improve color separation phenomena.

[0427] Alternatively, a backlight unit 120a for a display device can be provided that can improve the performance of white light realization.

[0428] Reference Figure 54 and Figure 55 In one embodiment, a plurality of light sources 200a located in the same row can be arranged in the same direction. For example, a plurality of light-emitting diodes (LEDs) of the plurality of light sources 200a located in the first row can be arranged in the row direction in the order of red LED 210, green LED 220, and blue LED 230. This can be referred to as a forward arrangement.

[0429] In the row following the first row of the ascending arrangement, the plurality of light sources 200a can be arranged in reverse order. For example, the light-emitting diodes of the plurality of light sources 200a in the second row can be arranged along the row direction in the order of blue light-emitting diode 230, green light-emitting diode 220, and red light-emitting diode 210. This can be referred to as an inverted arrangement.

[0430] An inverted permutation can be reversed relative to a forward permutation in the row direction of the matrix pattern. For example, an inverted permutation can be reversed horizontally relative to a forward permutation.

[0431] The plurality of light sources 200a can be arranged alternately in a forward and reverse order. For example, the plurality of light sources 200a can be arranged alternately in a forward and reverse order in each row. For example, the plurality of light sources 200a arranged in odd-numbered rows can each be arranged in a forward direction, and the plurality of light sources 200a arranged in even-numbered rows can each be arranged in a reverse direction.

[0432] Therefore, the light emission distribution of the red LED 210, the light emission distribution of the green LED 220, and the light emission distribution of the blue LED 230 can overlap to the maximum extent.

[0433] Alternatively, a backlight unit 120e for a display device that can improve color separation can be provided.

[0434] Alternatively, a backlight unit 120e for a display device that can improve the performance of white light realization can be provided.

[0435] Reference Figure 56 The arrangement direction of the red LEDs 210, green LEDs 220, and blue LEDs 230 of each of the plurality of light sources 200a can intersect with the row direction of the matrix pattern. For example, the red LEDs 210, green LEDs 220, and blue LEDs 230 of each of the plurality of light sources 200a can also be arranged along the column direction of the matrix pattern.

[0436] Reference Figure 57 and Figure 58 In one embodiment, a plurality of light sources 200c located in the same row can be arranged in the same direction. For example, a plurality of light-emitting diodes (LEDs) of the plurality of light sources 200c located in the first row can be arranged along the row direction in the order of a first red LED 211, a second red LED 212, a green LED 220, and a blue LED 230. This can be referred to as a forward arrangement.

[0437] In the row following the first row of the ascending arrangement, the plurality of light sources 200c can be arranged in reverse order. For example, the plurality of light-emitting diodes of the plurality of light sources 200c in the second row can be arranged along the row direction in the order of blue light-emitting diode 230, green light-emitting diode 220, and first red light-emitting diode 211 and second red light-emitting diode 212. This can be referred to as an inverted arrangement.

[0438] A reverse arrangement can be reversed in the row direction relative to a forward arrangement of a matrix pattern. For example, a reverse arrangement can be reversed horizontally relative to a forward arrangement.

[0439] The plurality of light sources 200c can be arranged alternately in a forward and reverse orientation. For example, the plurality of light sources 200c can be arranged alternately in a forward and reverse orientation in each row. For example, the plurality of light sources 200c arranged in odd-numbered rows can each be arranged in a forward orientation, and the plurality of light sources 200c arranged in even-numbered rows can each be arranged in a reverse orientation.

[0440] Therefore, the light emission distribution of the red LED 210, the light emission distribution of the green LED 220, and the light emission distribution of the blue LED 230 can overlap to the maximum extent.

[0441] Alternatively, a backlight unit 120h for a display device can be provided that can improve color separation phenomena.

[0442] Alternatively, a backlight unit 120h for a display device can be provided that can improve the performance of white light realization.

[0443] Reference Figures 1 to 58 The backlight unit 120 for the display device may include a plurality of light sources 200 arranged in a matrix pattern, each of the plurality of light sources 200 including a red light-emitting diode 210, a green light-emitting diode 220 and a blue light-emitting diode 230.

[0444] The backlight unit 120 for the display device may further include a diffuser plate 129 configured to receive light from the plurality of light sources 200.

[0445] The backlight unit 120 for the display device may further include at least one optical element 125 between the display panel 110 and the diffuser plate 129.

[0446] The light-emitting area of ​​the red light-emitting diode 210 can be larger than the light-emitting area of ​​the green light-emitting diode 220 and the light-emitting area of ​​the blue light-emitting diode 230.

[0447] In a plan view, the arrangement of the red LED 210, the green LED 220, and the blue LED 230 can form the perimeter of a substantially square.

[0448] The red LED 210, the green LED 220, and the blue LED 230 can extend long along the row or column direction of the matrix pattern.

[0449] The lengths of the red LED 210, the green LED 220, and the blue LED 230 can be substantially the same.

[0450] The light-emitting area of ​​the red LED 210 can be greater than or equal to approximately 1.4 times the light-emitting area of ​​the green LED 220 or the light-emitting area of ​​the blue LED 230.

[0451] The light-emitting area of ​​the red LED 210 can be greater than or equal to approximately 2.0 times the light-emitting area of ​​the green LED 220 or the light-emitting area of ​​the blue LED 230.

[0452] The light-emitting area of ​​the green light-emitting diode 220 can be substantially the same as that of the blue light-emitting diode 230.

[0453] The red LED 210, the green LED 220, and the blue LED 230 can be separated from each other along the width direction that intersects the length direction.

[0454] The spacing between the red LED 210, the green LED 220, and the blue LED 230 can be less than approximately 100 micrometers.

[0455] The light-emitting surfaces of the red light-emitting diode 210, the green light-emitting diode 220, and the blue light-emitting diode 230 can also form a single light-emitting surface.

[0456] The red light-emitting diode 210 can be provided between the green light-emitting diode 220 and the blue light-emitting diode 230.

[0457] The red light-emitting diode 210 can be located at the edge of the arrangement.

[0458] The red LED 210, the green LED 220, and the blue LED 230 can be arranged in the order of red LED 210, blue LED 230, and green LED 220.

[0459] The red light-emitting diode 210 may include a first red light-emitting diode 211 and a second red light-emitting diode 212 that have substantially the same light-emitting area and extend long.

[0460] The first red LED 211 and the second red LED 212 can be arranged in a continuous sequence.

[0461] The first red LED 211 and the second red LED 212 can be separated from each other along the width direction that intersects the length direction.

[0462] The distance between the first red LED 211 and the second red LED 212 can be less than the distance between the red LED 210 and the green LED 220 or the distance between the red LED 210 and the blue LED 230.

[0463] At least one of the green LED 220 or the blue LED 230 may also be provided between the first red LED 211 and the second red LED 212.

[0464] The green light-emitting diode 220 may include a first green light-emitting diode 221 and a second green light-emitting diode 222 that have substantially the same light-emitting area and extend long.

[0465] The first green light-emitting diode 221 and the second green light-emitting diode 222 can be provided between the first red light-emitting diode 211 and the second red light-emitting diode 212.

[0466] The blue light-emitting diode 230 can be provided between the first green light-emitting diode 221 and the second green light-emitting diode 222.

[0467] The red light-emitting diode 210 may include a first red light-emitting diode to a fourth red light-emitting diode 211, 212, 213, 214 that have substantially the same light-emitting area and extend elongatedly.

[0468] The green light-emitting diode 220 may include a first green light-emitting diode 221 and a second green light-emitting diode 222 that have substantially the same light-emitting area and extend long.

[0469] The blue light-emitting diode 230 may include a first blue light-emitting diode 231 and a second blue light-emitting diode 232 that have substantially the same light-emitting area and extend long.

[0470] The blue LED 230 and the green LED 220 may have substantially square light-emitting areas.

[0471] The red light-emitting diode 210 may include a first red light-emitting diode 211 and a second red light-emitting diode 212 that are substantially identical to each other and have substantially square light-emitting areas.

[0472] The first red LED 211, the second red LED 212, the green LED 220, and the blue LED 230 can be arranged in a 2x2 matrix pattern.

[0473] The red light-emitting diode 210 may surround at least a portion of the periphery of the blue light-emitting diode 230 and at least a portion of the periphery of the green light-emitting diode 220.

[0474] The red light-emitting diode 210 may have a ring shape surrounding the green light-emitting diode 220 and the blue light-emitting diode 230.

[0475] The green light-emitting diode 220 may have a ring shape surrounding the blue light-emitting diode 230.

[0476] The ring shape may include a square ring shape.

[0477] The red LED 210, the green LED 220, and the blue LED 230 can be arranged along the row direction of the matrix pattern regardless of their order.

[0478] Each of the plurality of light sources 200 arranged in the odd-numbered rows can be reversed in the row direction relative to each of the plurality of light sources 200 arranged in the even-numbered rows.

[0479] The backlight unit 120 for the display device may further include: a substrate 122 on which the plurality of light sources 200 are mounted; a first electrode pad 251 provided between the substrate 122 and the red light-emitting diode 210 and electrically connecting the red light-emitting diode 210 and the substrate 122; a second electrode pad 252 provided between the substrate 122 and the green light-emitting diode 220 and electrically connecting the green light-emitting diode 220 and the substrate 122; and a third electrode pad 253 provided between the substrate 122 and the blue light-emitting diode 230 and electrically connecting the blue light-emitting diode 230 and the substrate 122.

[0480] The red light-emitting diode 210 can completely cover the first electrode pad 251.

[0481] The green light-emitting diode 220 can completely cover the second electrode pad 252.

[0482] The blue light-emitting diode 230 can completely cover the third electrode pad 253.

[0483] Reference Figures 1 to 58 The backlight unit 120 for the display device may include: a plurality of light sources 200 arranged in a matrix pattern, each of the plurality of light sources 200 including a red light-emitting diode 210, a green light-emitting diode 220 and a blue light-emitting diode 230; a diffuser plate 129 configured to receive light from the plurality of light sources 200; and at least one optical sheet 125 located between the display panel 110 and the diffuser plate 129.

[0484] The light-emitting area of ​​the red light-emitting diode 210 can be larger than the light-emitting area of ​​the green light-emitting diode 220 and the light-emitting area of ​​the blue light-emitting diode 230.

[0485] The light source 200 can emit white light.

[0486] The current density of the red LED 210 can be less than or equal to the current density of the green LED 220 and the blue LED 230.

[0487] The current density of the red light-emitting diode 210 can be approximately 60% to approximately 100% of the current density of the blue light-emitting diode 230.

[0488] The current applied to the red LED 210 can be greater than the current applied to the green or blue LED 230.

[0489] The current applied to the red LED 210 can be approximately 1.5 times greater than the current applied to the blue LED 230.

[0490] The current density of the blue light-emitting diode 230 can be less than the current density of the green light-emitting diode 220.

[0491] The current applied to the green LED 220 can be greater than the current applied to the blue LED 230.

[0492] The light-emitting area of ​​the green light-emitting diode 220 can be substantially the same as that of the blue light-emitting diode 230.

[0493] The current density of the green light-emitting diode 220 can be approximately 1.4 times higher than that of the blue light-emitting diode 230.

[0494] In a plan view, the arrangement of the red LED 210, the green LED 220, and the blue LED 230 can form the perimeter of a quadrilateral.

[0495] The length of the arrangement of the red LED 210, the green LED 220, and the blue LED 230 can be approximately 0.75 to approximately 1.25 times the width of the arrangement of the red LED 210, the green LED 220, and the blue LED 230.

[0496] The lengths of the red LED 210, the green LED 220, and the blue LED 230 can be substantially the same.

[0497] The light-emitting area of ​​the red LED 210 can be approximately 2.0 times that of the green LED 220 or the blue LED 230.

[0498] The light source 200 can operate in the range of approximately 45 degrees Celsius to approximately 65 degrees Celsius.

[0499] Reference Figures 1 to 58The backlight unit 120 for the display device may include: a plurality of light sources 200 arranged in a matrix pattern, each of the plurality of light sources 200 including a red light-emitting diode 210, a green light-emitting diode 220, and a blue light-emitting diode 230; a diffuser plate 129 configured to receive light from the plurality of light sources 200; and at least one optical sheet 125 located between the display panel 110 and the diffuser plate 129; the light-emitting area of ​​the red light-emitting diode 210 may be greater than the light-emitting area of ​​the green light-emitting diode 220 and the light-emitting area of ​​the blue light-emitting diode 230.

[0500] The operating temperature of the light source 200 can be less than or equal to about 50 degrees Celsius.

[0501] The current applied to the red LED 210 can be greater than or equal to approximately 1.5 times the current applied to the blue LED 230.

[0502] The current applied to the green LED 220 can be greater than or equal to approximately 1.3 times the current applied to the blue LED 230.

[0503] The luminous efficiency of the red light-emitting diode 210 can be greater than approximately 60% (%) of the maximum luminous efficiency of the red light-emitting diode 210.

[0504] The brightness of the red light-emitting diode 210 can be greater than or equal to approximately 85% (%) of its maximum brightness.

[0505] The foregoing embodiments or other embodiments of the present invention are not mutually exclusive or distinct from each other. The respective configurations or functions of any of the foregoing embodiments or other embodiments of the present invention may be used in combination or together.

[0506] For example, this means that configuration A illustrated in a particular embodiment and / or drawing can be combined with configuration B illustrated in other embodiments and / or drawings. That is, even if the combination between configurations is not directly described, it is implied that they can be combined unless explicitly stated that they cannot be combined.

[0507] The detailed description above should not be construed as restrictive in all respects, but rather as exemplary. The scope of the invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention fall within its scope.

Claims

1. A backlight unit for a display device, wherein, include: substrate; A plurality of light sources are arranged in a matrix pattern on the substrate, each of the plurality of light sources including a red light-emitting diode, a green light-emitting diode and a blue light-emitting diode; A diffuser plate is configured to diffuse light emitted from the plurality of said light sources; as well as At least one optical element is located between the display panel and the diffuser plate; To compensate for the reduced efficiency of the red LED, the light-emitting area of ​​the red LED is larger than that of the green LED and also larger than that of the blue LED. The red LED, the green LED, and the blue LED are arranged adjacent to each other to form a single pixel unit.

2. The backlight unit for a display device according to claim 1, wherein, The luminous area of ​​the red LED is greater than or equal to approximately 1.4 times the luminous area of ​​the green LED or the luminous area of ​​the blue LED.

3. The backlight unit for a display device according to claim 1, wherein, The luminous area of ​​the red LED is greater than or equal to approximately 2.0 times the luminous area of ​​the green LED or the luminous area of ​​the blue LED.

4. The backlight unit for a display device according to claim 1, wherein, The red LED, the green LED, and the blue LED extend long along a first direction and have substantially the same length.

5. The backlight unit for a display device according to claim 1, wherein, During operation, the current density of the red LED is set to be lower than that of the blue LED.

6. The backlight unit for a display device according to claim 1, wherein, Also includes: The first electrode pad is disposed between the red light-emitting diode and the substrate; The second electrode pad is disposed between the green light-emitting diode and the substrate; as well as The third electrode pad is disposed between the blue light-emitting diode and the substrate; In a plan view, the red LED completely covers the first electrode pad.

7. The backlight unit for a display device according to claim 6, wherein, The first electrode pads comprise a pair of pads spaced more than 100 micrometers apart.

8. The backlight unit for a display device according to claim 1, wherein, The red light-emitting diodes include a first red light-emitting diode and a second red light-emitting diode that are separated from each other. The green light-emitting diode is positioned between the first red light-emitting diode and the second red light-emitting diode.

9. The backlight unit for a display device according to claim 1, wherein, The red light-emitting diodes include a first red light-emitting diode and a second red light-emitting diode that are separated from each other. The blue light-emitting diode is positioned between the first red light-emitting diode and the second red light-emitting diode.

10. The backlight unit for a display device according to claim 1, wherein, It also includes a heat dissipation pattern disposed between the substrate and the plurality of light sources.

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